“…127 on M mode is fairly specific but is insensitive as a test for PHT and has been reported in patients with normal PAP who have idiopathic dilatation of the pulmonary artery. 128 The adult right ventricle is roughly one third the thickness of the LV. Right ventricle hypertrophy can be measured using the M-mode echocardiogram or the electronic calipers on the two-dimensional image.…”