Plasmatic Levels of N-terminal Pro-BNP in Elderly Patients with Atrial Fibrillation and Heart Failure with Preserved Ejection Fraction - ZĂGREANU, Vasile Mircea; POP, Dana; ZDRENGHEA, Mihnea; SITAR-TAUT, Adela; CALOIAN, Bogdan; ZDRENGHEA, Dumitru Tudor (Iranian Journal of Public Health, 2017)