More importantly, BPA responders had higher SaO2, more favorable echocardiographic parameters [reflected by smaller right ventricular end-diastolic diameter/left ventricular end-diastolic diameter (RVED/LVED), greater left ventricular ejection fraction and lower tricuspid regurgitation velocity], lower VE/VCO2 slope and better hemodynamics (reflected by higher mixed venous oxygen saturation, lower mPAP, higher cardiac index and lower PVR) than BPA non-responders, even though these variables were comparable at baseline between the two groups. Here, DST is linked to tricuspid valve insufficiency.