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Heart failure (HF) with preserved ejection fraction (HFpEF) is increasing with aging of the population. Plasma levels of B-type natriuretic peptide (BNP) increase in proportion to the severity of left ventricular (LV) dysfunction. The object of this study was to examine the plasma levels of BNP in HFpEF to better understand the pathogenesis of HFpEF as compared with HF with reduced EF (HFrEF).Methods and Results:The study subjects comprised 468 HFpEF patients (158 men, 310 women, mean age 81.3±9.6 years) and 126 HFrEF patients (77 men, 49 women, mean age 75.4±12.0 years) who underwent echocardiography and routine clinical examinations including plasma BNP. Age, female prevalence, systolic blood pressure and pulse pressure were higher in the HFpEF patients than in the HFrEF patients (P&lt;0.0001, P&lt;0.001, P&lt;0.0001, and P&lt;0.0001, respectively). Plasma BNP levels, LV diastolic dimensions, and LV mass index (LVMI) were lower (P&lt;0.0001, P&lt;0.0001, and P&lt;0.0001, respectively), while relative wall thickness was higher (P&lt;0.0001) in the HFpEF patients than in the HFrEF patients. Multiple regression analysis revealed that LVMI, EF, plasma levels of albumin, C-reactive protein, and uric acid were the predictors of BNP levels (P&lt;0.001, P&lt;0.001, P=0.009, P=0.012, and P=0.018, respectively).

B-Type Natriuretic Peptide in Heart Failure With Preserved Ejection Fraction ― Relevance to Age-Related Left Ventricular Modeling in Japanese ―

B-Type Natriuretic Peptide in Heart Failure With Preserved Ejection Fraction　― Relevance to Age-Related Left Ventricular Modeling in Japanese ―