Disproportionately low BNP levels in patients of acute heart failure with preserved vs. reduced ejection fraction. (15th March 2021)

• Record Type: Journal Article
• Authors: Sakane, Kazushi; Kanzaki, Yumiko; Tsuda, Kosuke; Maeda, Daichi; Sohmiya, Koichi; Hoshiga, Masaaki
• Is Part Of: International journal of cardiology. Volume 327(2021)
• Page Start: 105
• Page End: 110
• Publication Date: 2021-03-15
• Subjects: Cardiac surgery -- Obesity -- Natriuretic peptide -- Acute heart failure; Cardiology -- Periodicals; Electronic journals; 616.12
• DOI: 10.1016/j.ijcard.2020.11.066
• Languages: English
• ISSNs: 0167-5273

Abstract

Abstract: Background: B-type natriuretic peptide (BNP) has been widely used for the diagnosis of heart failure, its severity, and prognosis. However, little is known about factors related to disproportionately low BNP levels even during acute heart failure conditions. Methods and results: Among 424 patients hospitalized for acute heart failure, we categorized the patients into the HFpEF (LVEF > 50%) or HFrEF (LVEF ≤ 50%) group and subdivided them into disproportionately low BNP (LB) group and high BNP (HB) group using a cut-off BNP level of 200 pg/mL at admission. The proportion of patients with LB was higher in the HFpEF group (22.2%) than in the HFrEF group (10.9%, p = 0.002). Patients with LB had a high BMI, lower blood pressure, and history of previous cardiovascular surgery in the HFpEF group, while patients in the HFrEF group had a high BMI and smaller left ventricular end-diastolic volume index. Furthermore, presence of LB in the HFrEF group was related to good prognosis, but LB in the HFpEF group was an indicator of poor prognosis as HB group. Conclusions: The factors associated with LB were different between the HFpEF and HFrEF groups. LB was related to good prognosis in HFrEF, but not in HFpEF. Highlights: We examined the factors associated with disproportionately low BNP even during acute heart failure conditions. The factors associated with disproportionately low BNP in HFpEF were high BMI and history of previous cardiovascular surgery, those in HFrEF were high BMI. Disproportionately low BNP was related to good prognosis in HFrEF, but not in HFpEF. Patients with disproportionately low BNP levels should be carefully observed to avoid underestimation of hemodynamic congestion and prognosis especially those with high BMI or HFpEF with a history of previous cardiovascular surgery.