Abstract
Physiologic left ventricular ejection efficiency assessed at the level of the aorta
Highlights
Physiologic left ventricular ejection efficiency assessed at the level of the aorta Mark Doyle, Geetha Rayarao, Victor Farah, Diane V Thompson, Ronald Williams, June A Yamrozik, Moneal Shah, Robert W Biederman*
Cardiovascular magnetic resonance (CMR) imaging has long been used to calculate the ejection fraction (EF) of the left ventricle (LV) and more recently to calculate the ventricular-vascular-coupling (VVC) ratio, both entirely measured within the LV
The aortic area was measured from the phase velocity mapping (PVM) images along with the average velocity, taken as a measure of blood wave velocity, the end-systolic time was taken as the pulse length and aortic area instead of diameter to yield the vascular ejection efficiency (VEE) index: VEE = Aortic Area × End systolic time / Average blood velocity
Summary
Cardiovascular magnetic resonance (CMR) imaging has long been used to calculate the ejection fraction (EF) of the left ventricle (LV) and more recently to calculate the ventricular-vascular-coupling (VVC) ratio, both entirely measured within the LV. We seek to demonstrate the role of blood transmission efficiency measure within the aorta
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