In patients who develop severe precapillary PH within 6–12 weeks after LT, which potentially reversible post-transplant contributors do you prioritize ruling out before escalating PAH therapy because they are most actionable and most plausibly causal in your experience?

The development of pre-capillary pulmonary artery hypertension post-liver transplant in the timeframe mentioned can be extremely serious. Obviously, the most life-threatening concern to rule out is acute pulmonary embolism, which could cause fairly dramatic hemodynamic changes and right heart dysfun...