Stroke, Vol 25, 2010-2016, Copyright © 1994 by American Heart Association
VG Davila-Roman, B Barzilai, TH Wareing, SF Murphy, KB Schechtman and NT Kouchoukos
BACKGROUND AND PURPOSE: The cause of cerebral and peripheral embolism
remains undetermined in a significant number of patients. An
atherosclerotic thoracic aorta has thus far been considered to be an
uncommon one. METHODS: To define the potential role of the ascending
thoracic aorta as an embolic source, intraoperative ultrasonic aortic
imaging was performed in 1200 of 1334 consecutive patients aged 50 years
and older who were undergoing cardiac surgery. Patients were divided into
two groups according to the results of the ultrasound study in terms of
presence or absence of atherosclerotic disease. The prevalence of previous
neurological events in the two groups was characterized and compared.
RESULTS: Ascending aortic atherosclerosis was present in 231 (19.3%) of the
patients studied. Patients in this category were older (P < .0001). A
higher percentage of them were smokers (P < .0001) compared with
patients with less severe disease. Coronary artery disease was more
extensive (P = .012), and a higher percentage of these patients had a
history of peripheral vascular disease (P < .0001). Univariate analysis
of the subjects with (n = 158) and without (n = 1042) previous neurological
events indicated that age, body mass index, atrial fibrillation,
hypertension, and atherosclerosis of the ascending aorta were associated
significantly with previous occurrence of a cerebrovascular accident. For
the group as a whole, multiple logistic regression analysis demonstrated
that hypertension (odds ratio, 1.81; P = .002), atherosclerosis of the
ascending aorta (odds ratio, 1.65; P = .013), and atrial fibrillation (odds
ratio, 1.54; P = .060) were significantly and independently associated with
the occurrence of previous neurological events. CONCLUSIONS:
Atherosclerosis of the ascending aorta is an independent risk factor for
cerebrovascular events. An atherosclerotic ascending aorta may represent a
potential source of emboli or may be a marker of generalized
atherosclerosis.
ARTICLES
Atherosclerosis of the ascending aorta. Prevalence and role as an independent predictor of cerebrovascular events in cardiac patients
Cardiovascular Division, Washington University, St Louis, MO 63110.
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