QS- and QR- pattern in leads V3 and V4 in absence of myocardial infarction:  electrocardiographic and vectorcardiographic study.
D002318:Cardiovascular Diseases; D004562:Electrocardiography; D006801:Humans; D009203:Myocardial Infarction; D014672:Vectorcardiography
ELECTROCARDIOGRAPHY; VECTORCARDIOGRAPHY