Understanding Intracerebral Hemorrhage: Causes, Symptoms, Diagnosis, and Treatment

Types of Stroke

• Hemorrhagic stroke – an artery ruptures and bleeds within the brain.
• Ischemic stroke – an artery becomes blocked, cutting off blood flow.

Hemorrhagic strokes are further divided into: - Intracerebral hemorrhage – bleeding inside the brain tissue (most common). - Subarachnoid hemorrhage – bleeding between the pia mater and arachnoid mater.

Brain Anatomy Overview

• Cerebrum – two hemispheres, each with a cortex divided into frontal, parietal, temporal, and occipital lobes.
• Cerebellum – located below the cerebrum, coordinates movement and balance.
• Brainstem – connects brain to spinal cord; controls heart rate, breathing, blood pressure, consciousness, and gastrointestinal function.
• Ventricles – cavities that contain cerebrospinal fluid; blood that enters them is called an intraventricular hemorrhage.

Blood Supply and the Circle of Willis

• Internal carotid arteries → middle cerebral arteries (lateral frontal, parietal, temporal lobes) and anterior cerebral arteries (medial frontal and parietal lobes) connected by the anterior communicating artery.
• Vertebral arteries → basilar artery → posterior cerebral arteries (occipital lobe, posterior temporal lobe, thalamus) and branches to cerebellum and brainstem.
• Posterior communicating arteries link the internal carotid system to the posterior cerebral arteries, completing the Circle of Willis, which provides collateral flow if a vessel is blocked.

Common Causes of Intracerebral Hemorrhage

• Hypertension – chronic high pressure causes:
• Hyaline arteriolosclerosis (protein leakage → stiff, brittle vessels).
• Charcot‑Bouchard microaneurysms in small penetrating arteries (e.g., lenticulostriate vessels).
• Arteriovenous malformations (AVMs) – tangled vessels lacking a capillary bed that can rupture.
• Vasculitis, vascular tumors (hemangioma), cerebral amyloid angiopathy – diseases that weaken vessel walls.
• Hemorrhagic conversion of an ischemic stroke – reperfusion of damaged vessels leads to rupture.

Pathophysiology After a Bleed

• Blood extravasates, forming a pool that raises intracranial pressure (ICP).
• Elevated ICP compresses adjacent brain tissue and reduces downstream cerebral perfusion, causing ischemia.
• Within hours, healthy tissue can die from both direct pressure and oxygen deprivation.
• Severe pressure may cause brain herniation through structures such as the falx cerebri, tentorium cerebelli, or foramen magnum.

Clinical Presentation (FAST)

• F – Facial drooping
• A – Arm weakness
• S – Speech difficulties (slurred speech, aphasia)
• T – Time – call emergency services immediately.
• Specific deficits depend on the affected region:
• Anterior/middle cerebral artery involvement → motor weakness, sensory loss.
• Broca’s area (left frontal) → expressive aphasia.
• Wernicke’s area (left temporal) → receptive aphasia.
• Posterior cerebral artery → visual field deficits.

Diagnosis

• CT scan – rapid detection of acute blood.
• MRI – detailed view of hemorrhage extent and surrounding tissue.
• Angiography – contrast study to locate the bleeding source and assess vascular anomalies.

Treatment Options

• Medical management:
• Antihypertensive drugs to lower blood pressure.
• Agents to reduce intracranial pressure (e.g., osmotic diuretics).
• Surgical interventions:
• Craniotomy – removal of a bone flap to evacuate superficial hematomas and relieve pressure.
• Stereotactic aspiration – CT‑guided needle drainage of deep hematomas.
• Goal: stop bleeding, lower ICP, restore adequate cerebral perfusion, and prevent secondary injury.

Quick Recap

• Intracerebral hemorrhage = rupture of a cerebral artery → blood pool → increased ICP + downstream ischemia.
• Hypertension is the leading cause; other contributors include AVMs, vasculitis, amyloid angiopathy, and hemorrhagic conversion.
• Recognize FAST symptoms, obtain emergent imaging, control blood pressure, and consider surgical evacuation when indicated.

Early recognition of stroke signs (FAST) and rapid medical treatment are critical to limit brain damage, control intracranial pressure, and improve the chances of a full recovery after an intracerebral hemorrhage.