Ischemic Event Recognition and Management

Primary Clinical Signs

The American Heart Association recommends recognizing ischemic events using the FAST assessment (Face, Arm, Speech, Time) combined with systematic neurological evaluation, as these signs indicate a medical emergency requiring immediate activation of emergency services and transport to a stroke center 1
Facial asymmetry, arm weakness, speech disturbance, and time of symptom onset are key components of the FAST assessment, with facial asymmetry presenting as unilateral facial weakness or droop, arm weakness as unilateral arm drift or inability to maintain position against gravity, speech disturbance as dysarthria or aphasia, and time as the exact time of symptom onset or when the patient was last at baseline 2, 3
Additional neurological signs include motor deficits, such as leg weakness with drift before 5 seconds or falls before 10 seconds, visual disturbances like hemianopia, diplopia, or complete bilateral visual loss, gaze abnormalities, sensory loss, limb ataxia, altered consciousness, and extinction or inattention 2, 3

The American Academy of Ophthalmology notes that transient monocular vision loss, branch retinal artery occlusion, and central retinal artery occlusion are signs of retinal arterial ischemia, with transient monocular vision loss being a retinal TIA, branch retinal artery occlusion causing permanent sectoral vision loss, and central retinal artery occlusion resulting in sudden, painless, permanent severe vision loss in one eye 5, 6
Acute retinal arterial ischemia carries the same stroke risk as cerebral TIA and requires immediate referral to a stroke center without performing additional testing in the ophthalmology office 5, 6

The American College of Cardiology recommends recognizing acute coronary syndrome presentation, including chest discomfort lasting longer than 15-20 minutes, radiation of discomfort to arms, jaw, neck, back, or epigastrium, associated symptoms like dyspnea, diaphoresis, nausea, vomiting, or dizziness, and dyspnea as a predominant symptom often with diaphoresis 7

The American Heart Association notes that dizziness or vertigo, especially when accompanied by other neurological signs, ataxia, and isolated visual disturbances, are less obvious stroke presentations that may indicate posterior circulation involvement 1

The American Heart Association recommends activating EMS immediately for any suspected stroke symptoms, assessing ABCs, preparing for CPR/defibrillation if needed, checking blood glucose to exclude hypoglycemia, documenting symptom onset time precisely, administering aspirin 160-325 mg if cardiac ischemia is suspected, and transporting the patient directly to a stroke center capable of advanced care 1, 4, 7
Initial hospital assessment should include vital signs, 12-lead ECG, brain imaging with non-contrast CT or MRI, and laboratory tests such as blood glucose, electrolytes, complete blood count with platelets, PT/INR, aPTT, renal function, and cardiac markers, all within 10 minutes of arrival 2, 3, 4