Abnormal Electrocardiograms in Apparently Healthy People

Apparently Healthy Population

Background. In myocardial infarction patients, heart rate-adjusted QT interval (QT), an electrocardiographic indicator of sympathetic balance, is prognostic for survival. Methods and Results. In a 28-year follow-up, the association between QT, and all-cause, cardiovascular, and ischemic heart disease mortality was studied in a population of 3,091 apparently healthy Dutch civil servants and thei...

Calcification of the pericardium in apparently healthy people; electrocardiographic abnormalities found in tracings from apparently healthy persons with calcification of the pericardium.

Case histories are presented of five apparently healthy persons showing pericar(lial (al(ification. Calcium deposits form in the dense pericardial scarring which is responsible for changes in the electrocardiogram. Awareness by the carldiologist of the possibility of pericardial scarring makes him particularly alert to electrocardiograms showing normal QRS complexes with T xvave changes, partic...

Postexercise electrocardiogram in patients with abnormal resting electrocardiograms.

One hundred and ten patients with chest pain syndromes and resting electrocardiograms demonstrating ST-T abnormalities and/or prior transmural myocardial infarctions were studied by means of the Master's two-step exercise test and selective coronary cine arteriography. Criteria for negativity were modified so that subjects with postexercise heart rates less than 110 beats/min, who did not devel...

Maximum treadmill exercise test in patients with abnormal control electrocardiograms.

Electrocardiograms of healthy men after strenuous exercise.

Between August 1954 and May 1957, 682 R.A.F. officers and men volunteered for a study of the electrocardiogram after exercise. Of these, 660 were selected because they had no symptoms, no clinical or radiological evidence of heart disease, a diastolic blood pressure of below 100 mm. Hg, and a normal 12-lead electrocardiogram taken at rest. Certain minor electrocardiographic changes that are bel...