Is impaired cerebral autoregulation distal to carotid stenosis/occlusion associated with increased risk of stroke at cardiac surgery with cardiopulmonary bypass?
Cerebrovascular reserve capacity evaluated by preoperative transcranial Doppler carbon dioxide testing is a major determinant of stroke risk in patients with carotid artery stenosis/occlusion undergoing cardiac surgery with cardiopulmonary bypass. Its assessment facilitates identification of patients with an excess perioperative stroke risk.
Lichen planus may be rarely induced by neoplasia. A cell-mediated immune reaction possibly causes this phenomenon.