Refining accuracy of RV-PA coupling in patients undergoing transcatheter tricuspid valve treatment.

RV-PA coupling predicts one-year mortality and heart failure rehospitalization after TTVR in patients with TR. The predictability is improved if invasively-measured PA pressure is included. Assessing right ventricular (RV) function is paramount for risk stratification. The present analysis confirms that RV-PA coupling, measured as TAPSE/PASP, predicts one-year mortality and heart failure rehospitalization in patients undergoing TTVR. There is a significant interaction between TR severity and the correlation of ePASP with iPASP, and therefore the correlation is attenuated in patients with massive to torrential TR. The predictability of RV-PA coupling is improved if PA pressure is measured invasively and included in the formula.