NPPB and hydrops fetalis: There were positive associations of PC with age (r = 0.362, P < 0.001, Fig. 1A), CHA2DS2-VASc (r = 0.297, P = 0.003, Fig. 1B), and NT-proBNP level (r = 0.207, P = 0.001, Fig. 1C) but not with other demographics, comorbidities except for HF (r = 0.174, P = 0.007) and medications.