to investigate coupling between the heart and arterial system in normal subjects and cardiac patients , we determined both the slope of the left ventricular end-systolic pressure-volume relation ( ventricular elastance ) and the slope of the arterial end-systolic pressure-stroke volume relation ( effective arterial elastance ) in three groups of subjects : group a , 12 subjects with ejection fraction of 60 % or more ;
C0018787
heart
C0018827
ventricular