Management and Treatment of CVA and TIA

Definition and Diagnosis

TIA is defined as a syndrome of acute neurological dysfunction referable to the distribution of a single brain artery with symptoms lasting <24 hours, while CVA involves symptoms and signs of neurological deficit persisting longer than 24 hours, according to the American Heart Association 1, 2
The definition of TIA has been revised to specify symptoms that last <1 hour, with many patients with symptoms briefer than 24 hours found to have cerebral infarction, as stated by the American Stroke Association 1, 2
Both conditions present with similar symptoms including unilateral weakness, sensory loss, visual disturbances, speech difficulties, and coordination problems depending on the affected vascular territory, as reported by the American Heart Association 1, 2

Patients with suspected TIA should be risk-stratified using validated tools such as the ABCD2 score, which considers Age, Blood pressure, Clinical features, Duration of symptoms, and Diabetes, as recommended by the International Stroke Society 3, 4
High-risk TIA patients should be admitted to a stroke unit or referred to a specialist TIA clinic if assessment can be completed within 24-48 hours, according to the International Stroke Society 3, 4
All patients with suspected acute stroke require immediate emergency department evaluation and should be transported by ambulance with high priority, as stated by the International Stroke Society 3

Urgent brain imaging and non-invasive vascular imaging should be completed within 24 hours for TIA patients, as recommended by the International Stroke Society 4
Carotid imaging is essential for TIA patients with anterior circulation symptoms to identify candidates for carotid revascularization, according to the American Heart Association 5
Immediate brain imaging is essential to differentiate ischemic stroke from intracerebral hemorrhage and exclude stroke mimics, as stated by the International Stroke Society 3

Eligible ischemic stroke patients should receive intravenous thrombolysis with rt-PA within 3 hours of symptom onset, as recommended by the International Stroke Society 3
Endovascular therapy may be considered for selected patients with large vessel occlusion, according to the International Stroke Society 3
Aspirin should be commenced within 48 hours of onset of acute ischemic stroke if not receiving thrombolysis, as stated by the International Stroke Society 3

Blood pressure management with a target of <130/80 mm Hg is recommended for TIA patients, as stated by the American Heart Association 6
Lipid management with statin therapy is recommended for TIA patients, according to the American Heart Association 6
Early mobilization and rehabilitation to optimize functional recovery is recommended for CVA patients, as stated by the International Stroke Society 3

TIA carries a high risk of early stroke, with risk as high as 10% within the first week of symptom onset, as reported by the International Stroke Society 4
CVA has higher morbidity and mortality, with outcomes dependent on stroke severity, location, timeliness of treatment, and quality of rehabilitation, according to the International Stroke Society 3

Recurrent falls in older adults create repeated opportunities for head trauma, and when combined with antiplatelet or anticoagulant therapy the risk of a delayed intracranial hemorrhage rises to approximately 5 % even if the neurological exam is initially normal. 7
A prior transient ischemic attack (TIA) implies that most patients are on antiplatelet (e.g., aspirin, clopidogrel) or anticoagulant medication, which markedly increases the bleeding risk after any head injury. 7
The risk of a full‑stroke occurring within the first week after a TIA is up to 10 %; new neurological symptoms such as falls therefore warrant immediate imaging to rule out an acute cerebrovascular event. 8

Patients meeting the above high‑risk criteria should be transported directly to an emergency department equipped with computed tomography (CT) capability without delay. 8, 9
An urgent non‑contrast head CT is required to assess for:
- Any intracranial hemorrhage (subdural, epidural, subarachnoid, or intraparenchymal). 7, 10
- New acute ischemic stroke. 8, 9
- Mass lesions or other structural abnormalities that could explain the falls. 10

Perform a 12‑lead electrocardiogram promptly to identify atrial fibrillation or acute cardiac ischemia that might precipitate embolic stroke or contribute to falls. 11, 9
If the CT reveals an ischemic stroke, obtain emergent vascular imaging (CTA from the aortic arch to the vertex) to evaluate for large‑vessel occlusion or significant carotid stenosis. 8, 11, 9
Order basic laboratory studies—including complete blood count, coagulation profile (PT/INR, aPTT), serum glucose, and troponin—to guide acute management and reversal strategies if bleeding is identified. 9

Do not wait for neurological deterioration; delayed intracranial hemorrhage can develop up to 8 days after trauma in patients on antiplatelet or anticoagulant therapy, even when initially asymptomatic. 7
Absence of a clear history of head impact does not exclude serious intracranial injury in the elderly, who may not recall the event. 7
Recognize that falls in a patient with cerebrovascular disease may be the presenting sign of a recurrent TIA or stroke (e.g., posterior‑circulation ataxia or anterior‑circulation leg weakness). 8
If warfarin‑associated intracranial hemorrhage is identified, immediate reversal of anticoagulation is indicated; even aspirin alone can predispose to clinically significant delayed bleeding. 7

The entire evaluation—including transport, imaging, ECG, vascular imaging, and laboratory testing—should be completed within hours of presentation, not days, because patients with suspected new cerebrovascular events within 48 hours are at the highest risk for poor outcomes. 8, 9
Early detection of treatable pathologies such as subdural hematoma or a large‑vessel occlusive stroke is time‑critical for optimizing neurological recovery and overall survival. 8, 11, 10