This response letter discusses the physiological concept and interpretation of echocardiographic right ventricular-pulmonary arterial coupling indices following transcatheter tricuspid valve repair.
Following transcatheter tricuspid valve repair, changes in right ventricular-pulmonary arterial coupling indices reflect hemodynamic shifts and loading conditions rather than intrinsic changes in right ventricular performance.
We would like to thank Pagnoni et al. for their thoughtful comments and for highlighting important aspects regarding the interpretation of echocardiographic right ventricular-pulmonary arterial coupling (RVPAC) indices following transcatheter tricuspid valve repair (TTVr).RVPAC represents a fundamental physiological concept describing the interaction between right ventricular contractility and pulmonary arterial afterload, traditionally derived from pressure-volume loop analysis as the ratio of end-systolic elastance to arterial elastance.
Stein et al. (Fri,) conducted a letter in Transcatheter tricuspid valve repair. Transcatheter tricuspid valve repair (TTVr) was evaluated. This response letter discusses the physiological concept and interpretation of echocardiographic right ventricular-pulmonary arterial coupling indices following transcatheter tricuspid valve repair.
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