Abstract
Background: Exercise results in a rise in cardiac output, with proportionally less effect on the pulmonary pressures, owing to reduced vascular resistance. Echocardiography readily estimates cardiac output and right heart pressures non–invasively. The echocardiographic pulmonary to left atrial ratio (ePLAR; tricuspid velocity maximum velocity [TRVmax]/mitral E/e′) is a new measurement for differentiating causes of elevated right heart pressures. The effect on ePLAR with exercise has not yet been evaluated. This study was designed to estimate the effect of exercise on right ventricular systolic pressure (RVSP) and ePLAR.
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