Background:Right ventricular dysfunction (RVD) in the setting of left ventricular (LV) myocardial damage is a major cause of morbidity and mortality, and the pulmonary artery pulsatility index (
PAPi
) is a novel hemodynamic index shown to predict RVD in advanced heart failure. However, it is unknown whether
PAPi
can predict the long-term prognosis of dilated cardiomyopathy (DCM) even in the mild to moderate phase. This study aimed to assess the ability of
PAPi
to stratify DCM patients without severe symptoms.
Methods and Results:Between April 2000 and March 2018, a total of 162 DCM patients with stable symptoms were evaluated, including
PAPi
, and followed up for a median of 4.91 years. The mean age was 50.9±12.6 years and the mean LV ejection fraction (EF) was 30.5±8.3%. When divided into 2 groups based on median value of
PAPi
(low, L-
PAPi
[<3.06] and high, H-
PAPi
[≥3.06]), even though there were no differences in B-type natriuretic peptide or pulmonary vascular resistance, the probability of cardiac event survival was significantly higher in the L-PAP than in the H-PAP group by Kaplan-Meier analysis (P=0.018). Furthermore, Cox’s proportional hazard regression analysis revealed that
PAPi
was an independent predictor of cardiac events (hazard ratio: 0.782, P=0.010).
Conclusions:Even in patients identified with DCM in the mild to moderate phase,
PAPi
may help stratify DCM and predict cardiac events.
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