Why the study?
Does leg raising reveal a tight coupling between left ventricular contraction and relaxation in coronary surgery patients?
Population
120 coronary surgery patients with preoperative ejection fraction >40%.
Comparison
Leg raising to increase cardiac systolic load… vs Baseline measurements prior to leg raising.
Design
Cohort
Authors
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Leg raising may flag load-dependent LV impairment in coronary surgery patients; hypothesis-generating for contraction-relaxation coupling, needs prospective confirmation.
Does leg raising reveal a tight coupling between left ventricular contraction and relaxation in coronary surgery patients?
There is a tight coupling between left ventricular contraction and relaxation, and leg raising can identify patients who develop load-dependent impairment of LV performance.
Hert et al. (1999) studied this question.
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