Variations in Electrocardiographic Responses during Exercise | Zendy

Paul N. Yu | Zendy; Robert A. Bruce | Zendy; Frank W. Lovejoy | Zendy; Marion E. McDowell | Zendy

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Variations in Electrocardiographic Responses during Exercise

Author(s) -

Paul N. Yu,

Robert A. Bruce,

Frank W. Lovejoy,

Marion E. McDowell

Publication year - 1951

Publication title -

circulation

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 7.795

H-Index - 607

eISSN - 1524-4539

pISSN - 0009-7322

DOI - 10.1161/01.cir.3.3.368

Subject(s) - medicine , cardiology , qrs complex , electrocardiography , precordial examination , exertion , t wave , st depression , depression (economics) , pr interval , st segment , heart rate , blood pressure , myocardial infarction , economics , macroeconomics

Precordial electrocardiograms were taken before, during, and after exercise in 20 normal subjects and in 48 patients with cardiopulmonary diseases. Analysis of the findings was based on changes in Q-T interval, alterations in QRS, RS-T and T waves and on presence or absence of premature beats. Whereas in performing standard tests, normal subjects showed no evidence of coronary insufficiency, in about two-thirds of the patients abnormal changes were demonstrable. Definite RS-T depression and changes in Q-T interval were also observed in normal subjects under unusual stresses. The electrocardiographic changes during exertion were discussed and emphasized.

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