Info

hemorrhage or infarction

abnormalities

Other Tests: Magnetic resonance imaging (MRI) is more sensitive than CT if the stroke is small and/or in the brain stem. Carotid duplex scanning is used in patients with acute ischemic stroke when carotid artery stenosis or occlusion is suspected. Transcranial Doppler ultrasound is used to evaluate the middle cerebral, intracranial carotid, and vertebrobasilar arteries. Echocardiography is used for patients with acute ischemic stroke when cardiogenic embolism is suspected. Continuous oximetry and electrocardiographic monitoring provides surveillance. Laboratory tests include complete blood count with differential, platelet count, prothrombin time (PT), activated partial thromboplastin time (APTT), electrolytes, creatinine, glucose. Other diagnostic tests that help evaluate cerebral blood flow, identify abnormalities, or locate the CVA include positron emission tomography, cerebral blood flow studies, and transthoracic two-dimensional echocardiography to identify intracardiac sites for thrombi.

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