NPPB and hydrops fetalis: In univariable Cox regression analysis, LVEF (hazard ratio [HR] 0.87, 95% confidence interval [CI] 0.77–0.99, per 5 percentage points, p = 0.03) and log(NT‐proBNP) (HR 1.38, 95% CI 1.14–1.66, p < 0.001) were predictors of the endpoint HF‐associated events.