We report 2 cases with hemorrhagic complications following percutaneous transluminal angioplasty (PTA) for carotid stenosis. Computed tomography (CT) scanning of these cases demonstrated diffuse subarachnoid hemorrhage in 1 case, and intracerebral hemorrhage in the other case on the day after PTA. In the latter case, we measured cerebral blood flow velocity and mean transit time with transcranial doppler (TCD) and dynamic CT scan, and TCD and dynamic CT demonstrated a remarkable increase in blood flow velocity and peak height respectively. From these results, postoperative hyperperfusion was supposed to have caused the hemorrhagic complication.
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