heart period variability ( standard deviation [ sd ] of 120 consecutive rr or pp intervals ) was measured at supine rest in 34 patients with congestive heart failure ( 23 patients receiving diuretics , digoxin or vasodilators and 11 patients weaned from all medications ) , 30 cardiac transplant patients ( both innervated recipient and denervated donor atrial rates ) and 16 age-matched healthy control subjects .
C0018787
heart
C0018792
atrial