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Observational Study
. 2024 Nov 26;84(22):2196-2210.
doi: 10.1016/j.jacc.2024.08.061. Epub 2024 Oct 23.

Clinical Implications of Pretest Probability of HFpEF on Outcomes in Precapillary Pulmonary Hypertension

Affiliations
Observational Study

Clinical Implications of Pretest Probability of HFpEF on Outcomes in Precapillary Pulmonary Hypertension

Yogesh N V Reddy et al. J Am Coll Cardiol. .

Abstract

Background: Patients with group 1 pulmonary hypertension (PH) and risk factors for heart failure with preserved ejection fraction (HFpEF) demonstrate worse response to pulmonary vasodilator therapy. The mechanisms and optimal diagnostic approach to identify such patients remain unclear.

Objectives: The purpose of this study was to compare exercise capacity, cardiac function, and hemodynamic responses to provocative maneuvers among patients with group 1 PH based upon pretest probability of HFpEF.

Methods: Pretest probability for HFpEF was determined using the validated HFpEF-ABA algorithm based on age, body mass index, and history of atrial fibrillation among group 1 PH patients recruited to the multicenter PVDOMICS (Redefining Pulmonary Hypertension through Pulmonary Vascular Disease Phenomics) study. Functional capacity, quality of life, and dynamic pulmonary capillary wedge pressure (PCWP) responses were compared between those with low (<25%), intermediate (25%-74%), and high (≥75%) ABA score-based HFpEF probability.

Results: Among 424 patients with group 1 PH, 54% (n = 228) had intermediate HFpEF probability and 15% (n = 64) had high HFpEF probability. Resting PCWP increased progressively with higher HFpEF probability (P < 0.0001), and patients with group 1 PH and high HFpEF probability had the greatest increases in PCWP with nitric oxide, fluid challenge, and exercise (P < 0.001 for all), changes that were comparable to patients with HFpEF with no pulmonary vascular disease (n = 194), but lower than those with HFpEF and combined precapillary and postcapillary PH. Left ventricular/atrial size, diastolic function, quality of life, 6-minute walk distance, and peak VO2 were most abnormal in patients with group 1 PH and high HFpEF probability compared with those with low or intermediate HFpEF probability (P < 0.0001 for all). Increasing HFpEF probability in group 1 PH was associated with greater risk of death (HR per decile of HFpEF probability 1.09; 95% CI: 1.05-1.13; P < 0.0001).

Conclusions: Quantifying pretest probability for HFpEF in patients with group 1 PH identifies a subset of patients with worse dynamic PCWP response indicative of subclinical left heart disease, with poorer functional status, quality of life, and survival. Further study in this group 1 PH subgroup is indicated to determine whether PH therapies are effective and safe, and also whether HFpEF-specific therapies can improve functional status and outcomes.

Keywords: HFpEF; exercise hemodynamics; pulmonary arterial hypertension.

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Conflict of interest statement

Funding Support and Author Disclosures The study was supported by grants from the National Institutes of Health/National Heart, Lung, and Blood Institute: U01 HL125218 (PI: Dr Rosenzweig), U01 HL125205 (PI: Dr Frantz), U01 HL125212 (PI: Dr Hemnes), U01 HL125208 (PI: Dr Rischard), U01 HL125175 (PI: Dr Hassoun), U01 HL125215 (PI: Dr Leopold), and U01 HL125177 (PI: Dr Beck), and by the Pulmonary Hypertension Association. Dr Reddy is supported by National Institutes of Health grant K23HL164901; has received research grants from Sleep Number, Bayer Accelerated Pulmonary Hypertension Award, United Jenesis Award, Merck, and the Earl Wood Career development award from Mayo Clinic. Dr Borlaug is supported by R01 HL128526, R01 HL162828, and U01 HL160226 from the National Institutes of Health/National Heart, Lung, and Blood Institute, and W81XWH2210245 from the U.S. Department of Defense; has received research grant funding from AstraZeneca, Axon, GlaxoSmithKline, Medtronic, Mesoblast, Novo Nordisk, and Tenax Therapeutics; has served as a consultant for Actelion, Amgen, Aria, Axon Therapies, BD, Boehringer Ingelheim, Cytokinetics, Edwards Lifesciences, Eli Lilly, Imbria, Janssen, Merck, Novo Nordisk, NGM, NXT, and VADovations; and is named inventor (U.S. Patent number 10,307,179) for the tools and approach for a minimally invasive pericardial modification procedure to treat heart failure. All other authors have reported that they have no relationships relevant to the contents of this paper to disclose.

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