Clinical Presentation: Intracerebral Hemorrhage vs Ischemic Infarct
The single most distinguishing clinical feature is the temporal pattern: intracerebral hemorrhage (ICH) characteristically presents with a smooth, progressive worsening of focal neurological deficits over minutes to a few hours while the patient is active, whereas ischemic stroke typically presents with maximal deficits at onset or stuttering progression. 1, 2
Temporal Pattern of Symptom Onset
- ICH: Symptoms begin suddenly while the patient is active (not at rest) and smoothly progress over minutes to hours—this smooth symptomatic progression over a few hours is uncommon in ischemic stroke and rare in subarachnoid hemorrhage 1, 2
- Ischemic stroke: Deficits are typically maximal at onset or may have stuttering/stepwise progression, but rarely show the smooth continuous worsening characteristic of ICH 1
Associated Symptoms That Favor ICH Over Ischemic Stroke
- Headache: More common with ICH than ischemic stroke (though less common than subarachnoid hemorrhage) 1, 2
- Vomiting: More common with ICH than either ischemic stroke or subarachnoid hemorrhage 1, 2
- Severely elevated blood pressure: Systolic BP often >220 mmHg in ICH, frequently exceeding levels seen in ischemic stroke 1, 2
- Impaired consciousness: Common early finding in ICH that may progress rapidly, whereas ischemic stroke patients are more often alert unless the stroke is massive 1, 2
Clinical Features That Increase Probability of ICH
The presence of any one of the following findings more than doubles the chance of ICH over ischemic stroke 1:
- Coma on arrival
- Vomiting
- Severe headache
- Current warfarin therapy
- Systolic blood pressure >220 mmHg
- Glucose level >170 mg/dL in a non-diabetic patient
Critical Limitation: Clinical Diagnosis Alone Is Insufficient
Clinical presentation alone, although helpful, is insufficient to reliably differentiate ICH from ischemic stroke—neuroimaging with CT or MRI is mandatory for definitive diagnosis. 1 Diagnostic errors based solely on clinical features still occur, and the level of accuracy is insufficient to guide treatment decisions 1
Early Neurological Instability
- ICH patients have greater neurological instability and higher risk of very early neurological deterioration than ischemic stroke patients, with 28-38% showing hematoma expansion when imaged within 3 hours of onset 1, 2
- The early risk of neurological deterioration and cardiopulmonary instability in ICH is high, necessitating neurocritical care monitoring 1
Prognostic Indicators to Assess Immediately
For ICH, the most powerful predictors of 30-day mortality are 1, 2:
- Glasgow Coma Scale score on admission
- Hematoma volume
- Presence of hydrocephalus
Imaging Requirement
- Non-contrast CT is the gold standard for identifying acute hemorrhage and must be performed emergently 1
- CT accurately identifies most cases of intracranial hemorrhage and helps discriminate non-vascular causes of neurological symptoms 1
- Rapid neuroimaging with CT or MRI is recommended to distinguish ischemic stroke from ICH (Class I, Level A evidence) 1