Predisposing risk factors and natural history of acute neurologic complications of left-sided cardiac catheterization.

The reported incidence of acute neurologic complications of left heart catheterization varies from 0.03% to 0.3%. The predisposing risk factors, clinical features, and natural history have not been well characterized. We retrospectively reviewed all cases of acute neurologic complications developing during or within 36 hours of diagnostic catheterization or angioplasty to determine the incidence, clinical features, and natural history, and (using a case-control methodology) the clinical variables associated with their development. During the 37-month study, 6,465 patients underwent diagnostic left-sided cardiac catheterization and balloon angioplasty or valvuloplasty, and 27 patients developed an acute neurologic complication (0.4%). The most common symptoms were visual disturbances (26%), hemiparesis (26%), and facial droop (26%). Deficits were localizable to the anterior or posterior circulation in 22 patients: posterior in 8 (36%), and anterior in 14 (64%). Long-term follow-up was available in all patients, with 17 of 27 (63%) having complete resolution with no residuum. With use of a case-control methodology and multiple logistic regression analysis, female gender, the presence of left ventricular hypertrophy, depressed ejection fraction, and the presence of > or = 2 coronary arteries with > 50% narrowing were independent predictors of a neurologic event.