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Arq. bras. cardiol ; 57(3): 213-221, set. 1991.
Article in Portuguese | LILACS | ID: lil-107919

ABSTRACT

Objetivo Avaliar correlação entre alterações do segmento ST indicativas de isquemia miocárdica, detectadas pela monitorização eletrocardiográfica ambulatorial, e os achados da cinecoronariografia. Métodos— Cinqüenta pacientes, 48 homens, com idades entre 20 e 73 (média 49 ± 13) anos, divididos em três grupos: I) assintomático (16 pacientes, 32%); II) precordialgia atípica (15 pacientes, 30%); e III) angina (19 pacientes, 38%). Procedeu-se à monitorização eletrocardiográfica ambulatorial por período de 24 horas, utilizando-se o sistema Cardiac Care Units (Compass TM). Os pacientes que apresentaram alterações do segmento ST, compatíveis com isquemia miocárdica transitória foram submetidos à cinecoronariografia. Quando esta foi considerada normal, o estudo foi complementado pela ecocardiografia e pelo teste de esforço. Resultados A presença de doença coronária ateroesclerótica (lesões obstrutivas ou fluxo lento) foi constatada em 24 (48%) pacientes. Em 26 (52%) pacientes, as artérias coronárias se apresentaram normais. Dentre esses, em 18 (36%) a ecocardiografia mostrou alqum tipo de afecção ou alteração anatômica (hipertrofia ventricular esquerda, prolapso da valva mitral, hipertrofia septal não obstrutiva, miocardiopatia dilatada). O ecocardiograma foi normal em 8 (16%) pacientes, dos quais em 5 (10%), o teste de esforço foi negativo, entre os quais 1 paciente (2% ) apresentava ponte miocárdica para a artéria descendente anterior, 2 (4%) alterações sintomáticas do segmento ST, e outros 2 paci entes (4%) eram assintomáticos...


Purpose To determine the usefulness of an ambulatory electrocardiographic monitoring system, in identifying atherosclerotic coronary artery disease among symptomatic and asymptomatic patients, through a comparison of ST-segment depression with angiographic findings. Methods Fifty patients, 48 men, with the mean age 49 ± 13 years (range 20 to 73), presenting ST-segment depression, were submitted to coronary angiography, complemented by echocardiogram and exercise testing, when the angiography was considered normal. According to the symptoms patients were divided into three groups: Iasymptomatic (16-32%); II¾ atypical chest pain (15-30%); and IIIangina (19-38%). The Cardiac Care Units(Compass TM) system was used for the ambulatory electrocardiographic monitoring.Results Twenty-four patients (48%) had significant atherosclerotic coronary artery disease documented angiographically. Twenty-six patients (52%) had normal coronary arteries by angiography: 18 (36%), presented some pathology demonstrated by echocardiographic studies (left ventricle hypertrophy, mitral valve prolapse, non-obstructive septal hypertrophy, dilated cardiomyopathy). Eight patients (16%) had normal echocardiograms, and in (6%) the exercise test was positive and in the other 5 (6%) negative. One of those patients (2%), with negative exercise test, had a myocardial bridge over the anterior descending branch of the left coronary artery, 2 patients (4%) presented symptomatic episodes of ST depression, and 2 other patients (4%) were assymptomatic...


Subject(s)
Electrocardiography, Ambulatory , Coronary Disease/diagnosis , Echocardiography , Circadian Rhythm , Coronary Angiography , Coronary Disease/physiopathology , Coronary Vessels/physiopathology , Coronary Artery Disease/diagnosis , Coronary Artery Disease/physiopathology , Diagnosis, Differential , Exercise Test
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