Resting heart rate and coronary artery calcium in postmenopausal women.

OBJECTIVE To test the hypothesis of a significant association between resting heart rate (RHR) and coronary artery calcium (CAC). METHODS This is a cross-sectional study of a subset of women enrolled in the estrogen-alone clinical trial of the Women's Health Initiative (WHI). We used a longitudinal study that enrolled 998 postmenopausal women with a… (More)