Angina pectoris and premature systoles induced by exercise.
D000787:Angina Pectoris; D001145:Arrhythmias, Cardiac / Q000209:etiology*; D004562:Electrocardiography; D006801:Humans; D013599:Systole
ANGINA PECTORIS/manifestations; ARRHYTHMIA/etiology and pathogenesis; ELECTROCARDIOGRAPHY