Computer aided exercise electrocardiographic testing and coronary arteriography in patients with angina pectoris and with myocardial infarction.

Abstract

sUmmARY A set of electrocardiographic criteria for the diagnosis of coronary artery disease was evaluated in two different groups of patients exmined by computer aided 12 lead exercise electrocardiographic stress testing and coronary arteriography. One group consisted of patients with severe angna pectoris and the other of patients who had suffered a myocardial infarction three years before the study. Angiographically determined categories of patients could be identified with satisfactory precision by the electrocardiographic criteria under test in the patients with angina pectoris but not in those with infarction. A new method of classifying patients on the basis of data from coronary arteriography improved the correlation with ST segment analysis compared with conventional classification.Exercise electrocardiographic testing is commonly used to detect coronary artery disease and also to evaluate the severity of disease and to observe the effect of treatment.1 Several reports suggest that the electrocardiographic response during exercise may correlate with the findings of coronary arteriography.2-4 Results have, however, also shown that exercise electrocardiographic testing poorly identifies patients with coronary artery disease. [5][6][7] Several factors influence the results of such investigations: (a) patient selection; (b) the reference method; (c) the definition of disease by the reference method; and (d) the procedures used in applying a method.The aim of this investigation was to determine whether a set of ST segment amplitude criteria could identify critical coronary lesions in two differently

Prediction of prognosis by echocardiography in patients with midgut carcinoid syndrome

“…Exercise electrocardiography (ECG) was performed with a customized computerized system, giving reliable estimation of ST deviations in relation to time and heart rate as validated by Angelhed et al 13 . Pulmonary function was assessed by spirometry.…”

Prediction of Left Ventricular Dysfunction in Coronary Artery Disease from Clinical and Exercise Test Findings

“…The exercise was started at 30 W for women and 50 W for men with 10-watt incre ments every minute. Depending on the hospital where the test was performed, four different computer-aided electrocardiographic sys tems or analogous techniques were used: the Bjuro system [15], the Swedish system [16]. the Schiller or the Marquette system.…”