Certificate Course in Epilepsy and Stroke

? Introduction to Stroke

A stroke is a sudden onset of neurological deficit due to an acute disturbance in cerebral circulation. This disruption can happen in one of two ways: either blood supply is blocked (ischemia) or a blood vessel ruptures (hemorrhage). And depending on which one happens, the clinical management and prognosis can vary greatly. So understanding the classification is vital."

? Types of Stroke – The Big Picture

"Now, let’s break it down. Broadly, strokes are divided into two major types:

? Ischemic Stroke (? 85% of all strokes)

This is the most common. Here, a part of the brain is deprived of oxygen because blood flow is blocked — like when a clot obstructs a coronary artery in a myocardial infarction. The same concept applies here, except the target is brain tissue, not myocardium. This can result from:

• Thrombotic occlusion – usually in an atherosclerotic vessel

• Embolic occlusion – often from a cardiac source like atrial fibrillation

If the blood flow is interrupted long enough, it leads to infarction of neural tissue – and that’s irreversible damage.

? Hemorrhagic Stroke (? 15% of all strokes)

Here, the problem is the rupture of a blood vessel, which causes bleeding into or around the brain. This type includes:

• Intracerebral Hemorrhage (ICH): Bleeding inside the brain parenchyma

• Subarachnoid Hemorrhage (SAH): Bleeding into the subarachnoid space — often due to ruptured berry aneurysms

• Intraventricular Hemorrhage (IVH): Bleeding into the brain’s ventricular system

These types can increase intracranial pressure, cause herniation, and rapidly lead to death if not managed."

⚠️ Don’t Forget: Transient Ischemic Attack (TIA)

"A term that often confuses students is the TIA, or Transient Ischemic Attack. A TIA is sometimes misleadingly called a ‘mini stroke’, but don’t let that make you underestimate it.

What happens here is a temporary loss of blood flow to a focal area of the brain. Symptoms resolve completely — and there is no infarction seen on imaging. Traditionally, we used to define it as lasting < 24 hours. But today, it’s defined based on absence of infarction, regardless of duration.

TIAs are clinical red flags. About 15–30% of patients with TIAs go on to develop a full-blown stroke — so these are urgent warning signs, not benign episodes."

? Epidemiology – Why This Matters Clinically

"Let me now give you a few figures to underline how important this is clinically:

• Stroke is the 4th leading cause of death in the United States.

• It is the leading cause of long-term disability.

• Around 5% of all deaths in the U.S. are due to stroke.

So, when we say that stroke is high-yield — it’s not just for your exams, it’s high-yield for your patients’ lives too."

? Classification by Hemorrhage Location

"To summarize the types of hemorrhage in a stroke:

• Intracerebral hemorrhage → Bleeding within the brain tissue itself.

• Subarachnoid hemorrhage → Bleeding into the space between the arachnoid and pia mater.

• Intraventricular hemorrhage → Bleeding inside the ventricles of the brain.

Each has a different etiology, clinical presentation, and imaging finding. We'll explore them in depth in upcoming lectures."

?? Integrated Clinical Physiology Scenarios

Let’s now reinforce what you’ve just learned with a few clinically integrated scenarios, rooted in physiology. These are perfect for USMLE Step 1/2 CK and also solidify your fundamentals.

? Clinical Case 1: Ischemic Stroke with MCA Involvement

A 62-year-old man with a history of uncontrolled hypertension and atrial fibrillation suddenly develops right-sided weakness and difficulty speaking.

? Physiology Integration:

• This is a classic middle cerebral artery (MCA) infarct.

• The MCA supplies the lateral parts of the frontal and parietal lobes, which control the face and upper limb motor and sensory functions.

• A dominant hemisphere lesion (usually left in right-handed individuals) also disrupts Broca’s area, leading to expressive aphasia.

• Atrial fibrillation predisposes to embolic stroke due to thrombus formation in the left atrial appendage.

? Clinical Case 2: TIA in Carotid Stenosis

A 68-year-old woman experiences a 15-minute episode of left-sided facial droop and arm weakness. She is back to baseline when you examine her. MRI shows no infarct.

? Physiology Integration:

• This is a transient ischemic attack, likely due to carotid artery stenosis.

• The carotid circulation supplies the anterior cerebral circulation, including motor areas for the face and upper limb.

• The symptoms resolved because perfusion was temporarily reduced, but not long enough to cause cell death.

• This underscores the cerebral autoregulation capacity — where cerebral blood vessels dilate to maintain perfusion pressure — but once the autoregulatory reserve is exhausted, symptoms appear.

? Clinical Case 3: Subarachnoid Hemorrhage

A 40-year-old woman presents with a sudden, severe headache described as the "worst headache of her life," along with neck stiffness and photophobia. CT shows blood in the basal cisterns.

? Physiology Integration:

• This is a subarachnoid hemorrhage, classically from ruptured berry aneurysm.

• The blood in the subarachnoid space irritates the meninges, causing meningeal signs like neck stiffness.

• The Circle of Willis, especially the anterior communicating artery, is the most common location for berry aneurysms.

• Autonomic and pressure regulation are overwhelmed due to rapid increase in intracranial pressure (ICP), leading to risk of herniation.

? Wrap-up Summary

"So, to summarize this high-yield lecture:

• Stroke = acute neurologic injury due to either ischemia (85%) or hemorrhage (15%).

• Ischemic strokes are due to vessel occlusion — and subdivided into thrombotic or embolic.

• Hemorrhagic strokes involve rupture of vessels — further classified based on location (intraparenchymal, subarachnoid, intraventricular).

• TIAs are warning signs — resolve without infarction but indicate high risk.

• Knowing vascular territories and physiology helps localize the lesion and understand symptoms.

• Stroke is both a medical and academic emergency — so mastering this concept helps save lives and scores."

? Localization of Stroke:

? Why is Stroke Localization Important?

"Imagine you're on the wards and a patient presents with sudden onset right-sided weakness and slurred speech. Before the imaging comes in, your brain should already be forming a hypothesis — which artery? what area? what functions?

Stroke localization teaches you how to do that.

you’ll often be given a clinical vignette that describes symptoms, and your task is to infer the vascular territory. This mirrors exactly what happens in real practice."

? Major Vascular Territories and Their Functions

Let’s now go over the big six stroke patterns, each tied to a specific arterial territory.

? Middle Cerebral Artery (MCA) — "The Most Common Culprit"

"MCA strokes are by far the most common type of ischemic stroke.

? Territory Supplied:

• Lateral surface of the cerebral hemisphere: motor and sensory cortex for the face and upper limb

• Broca’s and Wernicke’s area in the dominant hemisphere

• Frontal eye fields

• Parietal association areas in the non-dominant hemisphere

? Clinical Clues:

• Contralateral face and arm weakness more than leg

• Aphasia if it's the dominant hemisphere (typically left side)

  • Broca’s aphasia (expressive) if frontal lobe is involved

  • Wernicke’s aphasia (receptive) if temporal lobe is affected

• Hemineglect if it’s the non-dominant hemisphere

• Gaze preference toward the side of the lesion

• Contralateral sensory loss (face and arm > leg)

? Example:
A right-handed man develops sudden inability to speak and right facial droop. Imaging reveals a left MCA infarct. — Why left? Because language areas are dominant on the left in most right-handed people."

? Anterior Cerebral Artery (ACA) — "The Leg Stroke"

"The ACA supplies the medial portions of the frontal and parietal lobes.

? Territory Supplied:

• Motor and sensory cortex for the lower limb

• Medial frontal lobe (involved in motivation, micturition control)

? Clinical Clues:

• Contralateral leg weakness and numbness

• Abulia (lack of motivation or initiative)

• Urinary incontinence (due to medial frontal lobe involvement)

• Gait disturbance

? Example:
A patient develops sudden left leg weakness with reduced motivation and trouble initiating tasks. Suspect a right ACA infarct.

Think: ACA = Apathy, Abulia, and Ataxic Gait (involving the leg)"

?️ Posterior Cerebral Artery (PCA) — "The Vision Stroke"

"The PCA strokes can be subtle, often mistaken for ophthalmologic issues.

? Territory Supplied:

• Occipital lobe – visual cortex

• Inferior temporal lobe

• Thalamus (via small penetrating branches)

? Clinical Clues:

• Contralateral homonymous hemianopia

• Macular sparing (thanks to dual supply from MCA)

• Visual hallucinations

• Memory disturbances (medial temporal lobe involvement)

? Example:
*A patient sees only the right side of the world from both eyes. CT shows left PCA infarct. That’s right — PCA controls the opposite visual field."

⚙️ Lacunar Strokes — "The Silent Small Vessel Killers"

"These are small infarcts that occur due to occlusion of tiny penetrating arteries, especially in hypertensive or diabetic patients.

? Territory Supplied:

• Basal ganglia

• Internal capsule

• Thalamus

• Pons

? Clinical Clues:

• Pure motor hemiparesis (posterior limb of internal capsule)

• Pure sensory stroke (thalamus)

• Ataxic hemiparesis

• Dysarthria-clumsy hand syndrome

? Example:
An elderly hypertensive patient has sudden right-sided weakness with no cortical signs (no aphasia, neglect, or visual loss). This is a classic lacunar stroke."

? Brainstem Stroke — "The Danger Zone"

"Now we enter the most dreaded territory: the brainstem — supplied by the vertebrobasilar system.

? Territory Supplied:

• Midbrain, pons, medulla

• Cranial nerve nuclei

• Reticular formation

• Ascending and descending tracts

? Clinical Clues:

• Cranial nerve deficits (e.g., diplopia, dysarthria)

• Crossed findings: e.g., ipsilateral face with contralateral body weakness

• Vertigo, nystagmus

• Locked-in syndrome if bilateral ventral pons is affected

? Example:
A patient can move their eyes vertically but cannot move limbs or speak, though they are conscious — this is ‘locked-in syndrome’ due to basilar artery stroke."

? Cerebellar Stroke — "The Coordination Catastrophe"

"The cerebellum is the balance center — its stroke doesn’t cause weakness, but it causes chaos in coordination.

? Territory Supplied:

• Cerebellar hemispheres (via SCA, AICA, PICA)

? Clinical Clues:

• Ataxia (limb or gait)

• Dysmetria (past pointing)

• Intention tremor

• Nystagmus

• Vertigo and vomiting

? Example:
A patient stumbles to the right and can’t touch his nose on right finger-nose test. CT reveals right cerebellar infarct.

Be careful — large cerebellar strokes can cause mass effect and lead to brainstem compression."

? Clinical Pearls for Step 2 CK and Bedside Rounds

• Face + arm > leg = MCA

• Leg > arm = ACA

• Visual loss = PCA

• No cortical signs (aphasia, neglect) = Lacunar

• Cranial nerves + contralateral body = Brainstem

• Gait ataxia, dysmetria = Cerebellar

? Quick Case Integration for Clinical Reasoning

Case 1: A 70-year-old with atrial fibrillation suddenly develops right face and arm weakness with expressive aphasia → Left MCA stroke.

Case 2: A 65-year-old with hypertension has isolated left leg weakness and urinary incontinence → Right ACA stroke.

Case 3: A 58-year-old reports sudden vision loss in left visual fields of both eyes → Right PCA infarct.

Case 4: A 60-year-old hypertensive develops right-sided weakness without aphasia or visual field defects → Lacunar infarct in internal capsule.

Case 5: A 50-year-old has vertigo, left facial weakness, right body numbness, and diplopia → Lateral medullary syndrome (PICA territory).

Case 6: A young woman presents with nystagmus, limb ataxia, and intention tremor → Cerebellar infarct.

? Summary:

"In the end, localizing stroke is a clinical art powered by neuroanatomy and vascular logic. If you know which artery supplies what, the moment a patient presents with a certain deficit — you can predict where the infarct is before the CT scan even loads. That’s what separates a good clinician from a great one — and that’s what makes this topic so powerful for Step 2 CK and clinical practice alike."

?? Stroke Management:

⏱️ Step 1: Early Recognition — Time Is Brain

The first thing to understand is that stroke is a medical emergency. Any delay in diagnosis or treatment directly translates into more brain cells lost. We use the mnemonic FAST to identify common symptoms:

• Face drooping

• Arm weakness

• Speech difficulty

• Time to act immediately

Once a stroke is suspected, you should immediately activate the stroke team or stroke protocol in your hospital. Every minute matters — the goal is to perform imaging and start treatment within the shortest possible time window.

? Step 2: Non-contrast CT Scan — Rule Out Hemorrhage

The first investigation to be done is a non-contrast CT of the head. Why non-contrast? Because it is very sensitive for detecting acute bleeding inside the brain. Your first clinical question should be: Is this stroke ischemic or hemorrhagic?

Remember — ischemic strokes are more common, but hemorrhagic strokes are more deadly in the short term and require very different management. If the CT scan shows no hemorrhage, then you may proceed to reperfusion therapy, provided other eligibility criteria are met.

? Step 3: Assess Stroke Severity — NIH Stroke Scale

Use the NIHSS or National Institutes of Health Stroke Scale to grade the severity of the stroke. It evaluates parameters like level of consciousness, visual fields, motor and sensory deficits, speech, and attention. A high score indicates a large or severe stroke and may influence your decision-making regarding thrombolysis or thrombectomy. This scale also helps monitor progress during and after treatment.

? Step 4: Thrombolysis With IV tPA — The Golden Window

If the patient presents within 4.5 hours of symptom onset, and CT confirms there is no hemorrhage, and there are no contraindications, you can proceed with intravenous thrombolytic therapy, typically using tissue plasminogen activator (tPA).

The dose is 0.9 mg/kg, given as 10% bolus and the remaining over 1 hour. But always check for contraindications before administration. These include recent surgery, bleeding disorders, uncontrolled hypertension (>185/110 mmHg), recent head trauma, or use of anticoagulants.

Remember, if the patient gets tPA, do not give aspirin or heparin for the next 24 hours, as this can increase the risk of bleeding.

?️ Step 5: Mechanical Thrombectomy — For Large Vessel Occlusions

For patients with large vessel occlusions — such as those involving the internal carotid artery or proximal MCA — mechanical thrombectomy can be considered. This is a catheter-based procedure that physically removes the clot.

Thrombectomy can be done even beyond 4.5 hours, and in some cases up to 24 hours from symptom onset, especially if imaging shows a large area of salvageable brain (called the ischemic penumbra). Advanced imaging like CT perfusion or diffusion-weighted MRI helps determine this.

? Step 6: General Supportive Care and Neuroprotection

While the stroke-specific treatments are being planned, you must also manage the patient systemically to protect the brain and prevent secondary injury.

Maintain adequate oxygenation — aim for oxygen saturation above 94%. If the patient is drowsy, vomiting, or has a low GCS, intubation should be considered to secure the airway.

Ensure the patient is euvolemic — meaning they are neither dehydrated nor fluid overloaded. Avoid hypotension, as it may reduce cerebral perfusion. Hypotension should be corrected with fluids or vasopressors.

Blood sugar control is critical — both hypoglycemia and hyperglycemia can worsen stroke outcomes. Keep glucose levels between 140 to 180 mg/dL.

Temperature should be kept normal — fever increases neuronal damage. Use paracetamol or cooling methods to maintain normothermia.

If there is concern about elevated intracranial pressure, monitor the neurological exam closely and consider neurosurgical consultation. Avoid hyperosmolar therapy unless herniation is suspected.

Correct any electrolyte abnormalities and treat seizures if they occur. Prophylactic antiepileptics are not routinely given unless the patient has had a seizure.

Always assess for dysphagia, since aspiration pneumonia is a major cause of mortality post-stroke. A simple bedside swallowing assessment can help identify high-risk patients who need NPO status and enteral nutrition.

? Step 7: Medical Therapy and Secondary Prevention

If tPA was not given, start aspirin within the first 24 to 48 hours to reduce the risk of further thrombosis. In minor strokes or high-risk TIA cases, short-term dual antiplatelet therapy using aspirin and clopidogrel may be used for up to 21 days.

Start DVT prophylaxis — usually intermittent pneumatic compression devices initially. Subcutaneous low-molecular-weight heparin can be started once bleeding risk is excluded.

Begin a high-intensity statin like atorvastatin 80 mg daily for all patients with atherosclerotic or embolic stroke. Statins improve endothelial function, stabilize plaques, and reduce stroke recurrence.

Blood pressure management depends on the stroke type:

• In ischemic stroke without tPA, allow permissive hypertension up to 220/120 mmHg for the first 24–48 hours to maintain cerebral perfusion.

• If tPA is given, blood pressure must be strictly controlled under 185/110 mmHg before and during infusion.

• In hemorrhagic stroke, target systolic blood pressure between 140–160 mmHg to reduce rebleeding risk.

Keep the patient on telemetry monitoring for at least 24 hours. New-onset atrial fibrillation or other arrhythmias may be detected and guide the need for anticoagulation in secondary prevention.

? Step 8: Etiology Workup — Don’t Miss the Cause

Once the patient is stabilized, your job is to figure out why the stroke happened so that you can prevent another one.

Do an ECG and a 24-hour Holter monitor to look for atrial fibrillation. Consider an echocardiogram to identify structural heart issues like thrombus, valvular disease, or patent foramen ovale. Assess the carotid arteries via Doppler ultrasound or CT angiography to check for stenosis. If carotid stenosis >70% is found, the patient may benefit from carotid endarterectomy or stenting.

In young patients or those with recurrent strokes, evaluate for hypercoagulable states — including antiphospholipid syndrome, protein C/S deficiency, or malignancy-related thrombosis.

? Final Thoughts

Management of stroke is one of the most structured and high-yield protocols you’ll ever learn. From the moment of symptom onset, you need to think:

• Is it ischemic or hemorrhagic?

• Are we in the thrombolysis window?

• Is there a large vessel we can retrieve?

• Is the patient stable, oxygenated, normoglycemic, and afebrile?

• Can we prevent complications and future events?

Seizures and Epilepsy

? Introduction

Seizures are brief episodes of abnormal, excessive, or synchronous neuronal activity in the brain, often resulting in transient neurological symptoms. A single seizure doesn't always imply epilepsy; however, epilepsy is a chronic condition marked by recurrent unprovoked seizures.

? Seizure Definitions and Descriptors

• Seizure: A paroxysmal event caused by hypersynchronous neuronal discharge in the cortex.

• Acute symptomatic (provoked) seizure: Occurs in the context of an acute CNS or systemic insult such as stroke, trauma, infection, or metabolic imbalance. Common examples include seizures within one week of stroke, TBI, alcohol withdrawal, or during active CNS infection.

• Reflex seizure: Triggered by specific stimuli like flashing lights or music.

• Unprovoked seizure: Occurs in the absence of a known trigger.

Descriptors:

• Ictal: Events occurring during the seizure.

• Interictal: Time between seizures.

• Postictal: Period following a seizure, often marked by confusion or neurological deficits.

? Epilepsy Definitions

• Epilepsy is defined by:

  • Two or more unprovoked or reflex seizures >24 hours apart.

  • One seizure with a high likelihood of recurrence.

  • Diagnosis of an epilepsy syndrome.

• Reflex epilepsy involves seizures consistently triggered by identifiable stimuli.

• Drug-resistant epilepsy occurs when seizures persist despite trials of two appropriate AEDs.

• Resolved epilepsy applies to individuals seizure-free for 10 years, with at least 5 years off medication.

? Epidemiology

• Unprovoked seizures incidence: 61 per 100,000/year

• Epilepsy incidence: 79.1 per 100,000/year

• Prevalence of epilepsy: 8.5 per 1,000

⚖️ Etiology of Seizures and Epilepsy

Seizure Triggers: Sleep deprivation, alcohol, fever, flashing lights, stress, medication non-compliance.

Acute Symptomatic Seizures:

• Stroke, TBI, CNS infections (e.g., meningitis), metabolic disturbances, alcohol/drug withdrawal.

Chronic Causes (Epilepsy):

• Genetic: Ion channel mutations, metabolic disorders, chromosomal syndromes.

• Structural: Perinatal injury, tumors, hippocampal sclerosis, AVMs, malformations.

• Metabolic: PKU, uremia, porphyrias.

• Immune: Autoimmune encephalitis (anti-NMDA), SLE.

• Infectious: Neurocysticercosis, malaria, chronic meningitis.

Age-Based Causes:

• Neonates: Perinatal injury, congenital malformations.

• Infants/children: Febrile seizures, genetic epilepsy.

• Adolescents: TBI, infections, substance use.

• Adults: Tumors, trauma, alcohol.

• Elderly: Stroke, tumors, neurodegeneration.

⚖️ Classification of Seizures (ILAE 2017)

• Focal seizures: Begin in one hemisphere; awareness may be retained or impaired.

• Generalized seizures: Begin in both hemispheres simultaneously; always with impaired awareness.

• Unknown onset: When the origin of seizure activity can't be determined.

Epilepsy Types:

• Focal

• Generalized

• Combined (e.g., Lennox-Gastaut)

• Unknown

? Clinical Features

Focal Seizures:

• Aura may precede

• Motor: automatisms, Jacksonian march

• Sensory: visual, auditory, olfactory

• Cognitive/emotional: fear, déjà vu

• Postictal deficits (e.g., Todd paralysis)

Focal to Bilateral Tonic-Clonic:

• Starts focal, generalizes to bilateral tonic-clonic

• Often misdiagnosed as generalized seizure

Generalized Seizures:

• Tonic-clonic (grand mal): Loss of consciousness, tonic stiffening, clonic jerks, followed by confusion.

• Absence (petit mal): Brief loss of awareness, subtle automatisms.

• Myoclonic: Sudden, brief muscle jerks.

• Atonic: Sudden loss of tone, leading to collapse.

• Tonic/Clonic: Respective motor patterns dominate.

⚖️ Diagnostic Approach

• History: Characterization of event, aura, triggers, postictal state.

• EEG: Ictal/interictal findings, spike-and-wave discharges, hypsarrhythmia.

• Neuroimaging: MRI preferred for structural causes; CT if MRI unavailable.

• Bloodwork: Glucose, electrolytes, renal/liver function, toxicology.

• CSF analysis: If CNS infection suspected.

• ECG: To rule out arrhythmias in loss of consciousness.

⚡ Acute Management of Seizures and Status Epilepticus

• Initial stabilization: ABCs, recovery position, glucose check, remove hazards.

• <5 min seizure: Monitor closely; often self-limited.

• ≥5 min (Status Epilepticus):

  • First-line: IV lorazepam or diazepam

  • IM/IN/buccal midazolam if IV unavailable

  • Second-line: IV fosphenytoin, valproate, or levetiracetam

  • Refractory: Induce coma with propofol, thiopental, or phenobarbital

Treat reversible causes:

• Hypoglycemia: IV dextrose (+ thiamine if alcoholic)

• Electrolytes: Correct Na, Ca, Mg

• Alcohol withdrawal: Benzodiazepines + thiamine

• Eclampsia: Magnesium sulfate

⚖️ Long-Term Management

After First Seizure:

• Treat underlying cause

• AEDs not always necessary unless recurrence risk is high

For Epilepsy:

• Start monotherapy (lamotrigine, levetiracetam, valproate)

• If ineffective: increase dose or switch drugs before combining

• Drug-resistant epilepsy: consider surgery, vagus nerve stimulation, or ketogenic diet

Tapering:

• May be considered after 2–5 years seizure-free

• Taper slowly; monitor EEG and clinical state

? Prognosis and Complications

• 60–70% of treated patients become seizure-free within 10 years

• SUDEP: sudden unexpected death in epilepsy, especially in poorly controlled cases

• Cognitive decline, depression, psychosis may occur long-term

• Antiepileptic drugs can cause osteopenia, dermatologic reactions, or psychiatric effects

⚖️ Special Consideration: Epilepsy in Pregnancy

• Folic acid is essential for all women of childbearing age

• Low-risk AEDs: lamotrigine, levetiracetam

• High-risk AEDs: valproate, phenobarbital

• Monitor drug levels throughout pregnancy due to pharmacokinetic changes

• Risks include low birth weight, congenital malformations, and maternal complications like preeclampsia and postpartum hemorrhage

⚡ Status Epilepticus Recap

• Defined as a seizure lasting ≥5 minutes or repetitive seizures without full recovery

• Time threshold varies by type (5 min for tonic-clonic; 10–15 for focal/absence)

• High mortality in neonates and elderly

• Urgent benzodiazepine therapy is critical

• Always treat reversible causes alongside seizure termination

? Acute Management of Seizures and Status Epilepticus

Acute seizure management depends on how long the seizure has lasted and whether the patient is still actively seizing. Early intervention can prevent complications like brain injury, systemic instability, or progression to status epilepticus.

Stepwise Clinical Approach:

• Begin with initial stabilization. Always ensure safety, maintain airway, and monitor vitals.

• Identify and correct reversible causes such as hypoglycemia, hyponatremia, or drug withdrawal.

• Implement phase-based pharmacologic management based on seizure duration.

Initial Stabilization Measures:

• Call for help and eliminate hazards (e.g., remove objects around the patient).

• Use the ABCDE approach:

  • Airway: Perform airway maneuvers, suction if necessary.

  • Breathing: Administer oxygen.

  • Circulation: Check pulse and BP.

  • Disability: Assess GCS.

  • Exposure: Identify trauma or rash.

• Place the patient in the recovery position to prevent aspiration.

• Check point-of-care glucose and correct if abnormal.

Phase-Based Pharmacologic Management:

Early Phase (0–5 minutes):

• Observe closely. Most seizures resolve spontaneously.

• Prepare medications in case seizure persists beyond 5 minutes.

Early Status Epilepticus (5–20 minutes):

• First-line therapy: Administer IV benzodiazepines.

  • IV lorazepam or diazepam.

  • If IV access is unavailable: use IM midazolam, intranasal midazolam, buccal midazolam, or rectal diazepam.

• Can repeat the dose every 5–10 minutes if seizures persist.

Established Status Epilepticus (20–40 minutes):

• If seizure persists after benzodiazepines, initiate second-line agents:

  • IV fosphenytoin, valproic acid, or levetiracetam.

  • IV phenobarbital is also an option, especially in children.

Refractory Status Epilepticus (40–60 minutes):

• If seizures continue despite second-line therapy, induce coma using:

  • IV propofol, thiopental, midazolam, or pentobarbital.

• Continue to monitor and treat reversible causes concurrently.

Management of Rapidly Reversible Causes:

• Hypoglycemia: Give IV dextrose, and add thiamine if alcohol use is suspected.

• Hyponatremia: Correct with hypertonic 3% saline.

• Hypocalcemia: Administer IV calcium gluconate.

• Hypomagnesemia: Replete with IV magnesium sulfate.

• Hyperthermia: Initiate cooling. Give antipyretics in febrile seizures.

• Eclampsia: Start magnesium sulfate and manage hypertension.

• Hypertensive encephalopathy: Use IV antihypertensives and manage seizures together.

• Alcohol withdrawal: Use benzodiazepines, add thiamine, and consider anticonvulsants if seizures recur.

• Toxic ingestion: Treat with benzodiazepines and avoid phenytoin in certain poisonings.

Key Reminder: If the seizure onset time is unknown, always manage as status epilepticus.

Acute seizures are frequently self-limiting but should always be evaluated thoroughly to avoid missing high-risk or life-threatening causes. Immediate action, airway protection, and timely medication are cornerstones of care.

? Hemorrhagic Stroke

Introduction

Hemorrhagic Stroke, one of the most feared neurological emergencies. Unlike ischemic stroke, where a blood vessel gets blocked and the brain tissue is deprived of oxygen, here the problem is the rupture of a vessel. When that happens, blood leaks directly into the brain or into the spaces around the brain. This sudden rise in pressure and damage to brain tissue leads to severe symptoms, and if not recognized quickly, it carries a very high risk of disability or death.

As future clinicians and exam takers, you need to clearly differentiate hemorrhagic stroke from ischemic stroke, because the management is entirely different — and giving the wrong treatment, like thrombolytics, could be fatal.

Types of Hemorrhagic Stroke

There are two major categories we must know:

? Intracerebral Hemorrhage (ICH)

• Definition: Bleeding directly into the brain tissue (the parenchyma).

• Causes: The most common cause is chronic hypertension, which weakens small penetrating arteries, particularly in deep brain structures. Other causes include cerebral amyloid angiopathy (especially in elderly with lobar bleeds), head trauma, anticoagulant use, and vascular malformations such as AV malformations.

• Clinical features: Patients present with sudden onset focal neurological deficits — for example, weakness, sensory loss, or speech difficulty. These are often accompanied by headache, nausea, vomiting, and changes in consciousness because of rising intracranial pressure.

• Common sites: Basal ganglia, thalamus, pons, and cerebellum are classically affected.

• Pearl: Hypertensive bleeds → usually in deep structures; Lobar hemorrhages in elderly → think of amyloid angiopathy.

? Subarachnoid Hemorrhage (SAH)

• Definition: Bleeding into the subarachnoid space, which is the space between the arachnoid and pia mater that normally contains CSF.

• Causes: The most important cause is rupture of a berry aneurysm (commonly in the anterior communicating artery). Trauma and vascular malformations are also culprits.

• Clinical features: The hallmark symptom is the “worst headache of my life.” Students often call this a thunderclap headache. Patients may also have photophobia, neck stiffness (due to meningeal irritation), vomiting, or transient loss of consciousness.

• Diagnosis: The first test is a non-contrast CT scan of the head. If the CT is negative but suspicion is very high, we proceed with a lumbar puncture to look for xanthochromia (yellow discoloration due to RBC breakdown products in the CSF).

Diagnosis – How to Approach Acute Stroke

When a patient presents with sudden neurological deficit, the very first investigation is a non-contrast CT scan of the head.

• Why? Because we must rule out hemorrhage before giving any thrombolytic therapy.

• CT is very good at detecting acute blood.

• MRI can be used later, but in the acute setting, CT is faster and essential.

Key Management Principles

? Avoiding Thrombolysis

• In hemorrhagic stroke, thrombolytic therapy (like alteplase) is contraindicated. Giving it would worsen the bleeding and kill the patient. That’s why CT confirmation is mandatory in all stroke cases before starting therapy.

? Blood Pressure Control

• In intracerebral hemorrhage, blood pressure often shoots up. Guidelines recommend lowering systolic blood pressure to around 140–160 mmHg.

• The idea is to reduce ongoing bleeding while maintaining enough cerebral perfusion.

? Reversal of Anticoagulation

• If the patient is on anticoagulants, we must act quickly to reverse them.

  • For warfarin → Vitamin K, PCC (prothrombin complex concentrate), or FFP (fresh frozen plasma).

  • For dabigatran → Idarucizumab, a specific antidote.

  • For factor Xa inhibitors → options include andexanet alfa or PCC depending on availability.

?‍⚕️ Neurosurgical Intervention

• Not all patients need surgery, but certain situations demand urgent neurosurgical evaluation:

  • Large hematomas causing mass effect

  • Cerebellar hemorrhages that compress the brainstem

  • Herniation syndromes

• In such cases, decompression or evacuation of the clot can be lifesaving.

? Management of Subarachnoid Hemorrhage

• Beyond stabilizing the patient, remember the complications:

  • Rebleeding is common in the first few days.

  • Vasospasm (narrowing of cerebral arteries) can cause delayed ischemia. This is prevented with Nimodipine, a calcium channel blocker.

  • Hydrocephalus can also occur due to blockage of CSF pathways.

Clinical Pearls – Exam & Bedside Must-Knows

• Hypertensive hemorrhage → think deep brain structures.

• Lobar hemorrhage in elderly → think cerebral amyloid angiopathy.

• SAH with “worst headache of life” → first test is CT head, second (if CT is negative) is LP.

• Always monitor for increased ICP and herniation: look for Cushing’s triad (bradycardia, hypertension, irregular breathing).

Summary – Key Take-Home Points

• Hemorrhagic strokes are caused by rupture of vessels → bleeding into brain tissue (ICH) or subarachnoid space (SAH).

• CT scan is the first and most essential investigation.

• Never give thrombolytics in hemorrhagic stroke.

• Control blood pressure, reverse anticoagulation, and involve neurosurgery when indicated.

• SAH requires nimodipine for vasospasm prevention and monitoring for rebleeding or hydrocephalus.