20Jul 2024
Right Ventricular Stiffness Linked to Poor Cardiac Output in PAH

Right Ventricular Stiffness Linked to Poor Cardiac Output in PAH

In pulmonary arterial hypertension (PAH), poor cardiac output reserve during exercise is linked to right ventricular (RV) stiffness and impaired interventricular dependence. A study analyzing pressure-volume loops in 41 PAH patients found that those with low cardiac index reserve during exercise had higher RV stiffness, right-sided pressures, and lower left ventricular filling. This suggests that RV stiffness and afterload are key factors in poor exercise tolerance in PAH.

  • #pulmonology

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