The right ventricle in disorders causing pulmonary venous hypertension.

The right ventricle is frequently affected by pulmonary arterial hypertension of postcapillary obstructive origin. The disorders that cause states of pulmonary venous hypertension arise in the left ventricle, left atrium, or pulmonary veins. Biochemical factors, the pericardium, interventricular septum, and pulmonary arterial system combine to communicate the effects of these disorders to the right ventricle. Although not ideally suited to pressure loading, the right ventricle undergoes a series of structural and hemodynamic adaptations that allow for chronic compensation until failure supervenes, with characteristic clinical findings. Exercise may serve to magnify the abnormalities of right ventricular function. Correction of left-sided heart lesions with improvement in pulmonary venous hypertension is associated with favorable effects on the right ventricle. In states of left-sided heart failure, the level of right ventricular function may provide important prognostic information.