Ten of 152 patients ( 7 % ) had no PH , 81 of 152 ( 53 % ) had precapillary PH , and 61 of 152 ( 40 % ) had postcapillary PH. The following five echocardiographic variables were found to predict precapillary PH : right heart chamber larger than the left ( P = .0018 ) , left ventricular eccentricity index > 1.2 ( P = .0039 ) , dilated inferior vena cava without inspiratory collapse ( P = .0076 ) , E/e ' ratio 10 ( P = .00001 ) , and the right ventricle forming the heart apex ( P = .0144 ) .