Cardiopulmonary bypass in patients with previously completed stroke.

It has been assumed that patients with neurological residua after a completed stroke are at increased risk of neurological complications associated with cardiac operations requiring cardiopulmonary bypass. To evaluate these assumptions, we reviewed retrospectively 1,163 consecutive patients undergoing cardiac operations with cardiopulmonary bypass. Among these 1,163 patients were 43 patients having a previously completed stroke with neurological residua, but without clinically significant extracranial carotid artery disease. Forty-one underwent coronary artery bypass grafting; of these, 1 required concomitant aortic valve replacement, 1 had mitral valve replacement, and 1 had aortic valve replacement. There was one death in this group of 43 patients, due to massive pulmonary embolism. Only 1 of these 43 patients experienced new neurological symptoms after operation, which would appear to indicate that patients with a previous, completed stroke may not be at increased risk of neurological complications from cardiac operations requiring cardiopulmonary bypass.