Abstract 15927: Polyunsaturated Fatty Acid Levels and Their Relationship With Peak Exercise Measures in HFpEF
Cheshta Prasad, Joseph Campain, Joan Helmering, Clarence Hale, Michelle Chen, Murielle Veniant-Ellison, Rajeev Malhotra, Gregory Lewis- Physiology (medical)
- Cardiology and Cardiovascular Medicine
Background: Polyunsaturated fatty acids (PUFAs) regulate the inflammatory cascade and have been implicated in potential pathologic and therapeutic roles in heart failure with preserved LVEF (HFpEF). The purpose of this study was to explore the relationship between plasma levels of omega-3 (ω-3) fatty acids and invasive hemodynamic profiles characteristic of early HFpEF.
Methods: In a single-center referral cohort undergoing evaluation for exertional dyspnea and suspected HFpEF, we assayed ω-3 concentrations in plasma by liquid chromatography. We derived an ω-3 score by summing Z-scores of docosahexaenoic acid (DHA) and eicosapentaenoic acid (EPA). Linear regression was used to relate plasma ω -3 levels to simultaneously collected physiologic data from cardiopulmonary exercise testing (CPET) with invasive catheterization.
Results: 588 patients (52% female, age 62 ± 12 years, BMI 30 ± 6 kg/m 2 , peak oxygen uptake (VO 2 ) 15.5 ± 5.1 mL/min/kg [76 ± 20% predicted], NTproBNP 118 [33 - 405] pg/mL) were studied. Median ω -3 concentrations were 72 [46 - 107] pg/mL for EPA and 315 [225 - 457] pg/mL for DHA. Female sex and increased age were associated with higher levels of ω-3 fatty acids ( Table , p=0.03). After adjustment for age, sex, and BMI, a higher ω-3 score was associated with greater exercise capacity measured by peak VO 2 (p<0.001) and peak workload (p<0.001) along with an increase in peak exercise peripheral O 2 extraction (CavO 2 ; p < 0.001). Notably, increased ω-3 score was associated with lower supine pulmonary capillary wedge pressure (PCWP; p=0.03), PCWP to cardiac output (CO) slope during exercise (p = 0.009), and NTproBNP (p < 0.001).
Conclusion: These data demonstrate that circulating ω-3 fatty acid levels are associated with exercise capacity and both central cardiac and peripheral function in HFpEF. Further studies are needed to unravel the relationship between modulation of plasma PUFAs and rest and exercise hemodynamic profiles of HFpEF.