Representative measurement and calculation of the right pulmonary artery distensibility (RPAD) index in a dog with a peak tricuspid regurgitation systolic pressure gradient
(TRPG) <36 mmHg. RPA, right pulmonary artery; RPAD, RPA at its minimum diameter in diastole; RPAS,
RPA at its maximum diameter in systole; RA, right atrium; RV, right ventricle; Ao, aorta; PA, pulmonary artery.
Visser LC, Im MK, Johnson LR, Stern JA. "Diagnostic Value of Right Pulmonary Artery Distensibility Index in Dogs with Pulmonary Hypertension: Comparison with Doppler Echocardiographic Estimates
of Pulmonary Arterial Pressure". J Vet Intern Med. 2016;30(2):543–552. doi:10.1111/jvim.13911