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Circulation, Vol 64, 674-684, Copyright © 1981 by American Heart Association
HG Olson, KP Lyons, WS Aronow, PJ Stinson, J Kuperus and HJ Waters
We evaluated 193 consecutive unstable angina patients by clinical features,
hospital course and electrocardiography. All patients were managed
medically. Of the 193 patients, 150 (78%) had a technetium-99m
pyrophosphate (Tc-PYP) myocardial scintigram after hospitalization. Of
these, 49 (33%) had positive scintigrams. At a follow-up of 24.9 +/- 10.8
months after hospitalization, 16 of 49 patients (33%) with positive
scintigrams died from cardiac causes, compared with six of 101 patients
(6%) with negative scintigrams (p less than 0.001). Of 49 patients with
positive scintigrams, 11 (22%) had had nonfatal myocardial infarction at
follow-up, compared with seven of 101 patients (7%) with negative
scintigrams (p less than 0.01). Age, duration of clinical coronary artery
disease, continuing angina during hospitalization, ischemic ECG,
cardiomegaly and a history of heart failure also correlated with cardiac
death at follow-up. Ischemic ECG and a history of angina with a crescendo
pattern also correlated with nonfatal infarction at follow-up. Patients
with continuing angina, an ischemic ECG and a positive scintigram
constituted a high-risk unstable angina subgroup with a survival rate of
58% at 6 months, 47% at 12 months and 42% at 24 and 36 months. We conclude
that the assessment of clinical features, hospital course, ECG and Tc-PYP
scintigraphy may be useful in identifying high-risk unstable angina
patients.
ARTICLES
The high-risk angina patient. Identification by clinical features, hospital course, electrocardiography and technetium-99m stannous pyrophosphate scintigraphy
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