Electrocardiographic changes during exercise in Kurdish and Yemenite Jews in Israel.

The electrocardiographic changes of 33 Kurdish and Yemenite Jews aged I8-30 years were studied at rest and during four levels of exercise, on an upright stationary bicycle ergometer. The results obtained confirm and extend our previous findings on Europeans (Davies et al., I971) and suggest that a depression of less than i mm at a point in the ST segment 68 msec after the onset of the R wave, and increased slope of the ST segment is a normal response to exercise in both.Jewish and British subjects. No evidence wasfound to support those who claim that otherwise healthy people ofJewish descent have an unusually high incidence of electrocardiographic abnormality either at rest or during exercise.