NPPB and hydrops fetalis: In fact, a study recruiting similar patients with asymptomatic “malignant” LV hypertrophy defined by increased LV mass index on cardiac magnetic resonance imaging and elevated NT-proBNP or cTnT revealed, after 12.2 years, a larger risk for HFrEF (49.2% of incident HF) than HFpEF (40.6% of incident HF) [91].