ArticleJournal of vascular research2026
Effects of Exercise Mode and Intensity on Retinal Microvascular Structure and Function in Heart Failure Patients with Preserved Ejection Fraction: A Pilot Exercise Intervention Trial.
Article in Journal of vascular research, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
introductionWe aimed to investigate the effect of different exercise modes on retinal microvascular endothelial function in patients with HF with preserved ejection fraction (HFpEF).
methodsTwenty-eight patients were randomly allocated to either a moderate (MCT) or high-intensity interval training (HIIT) group for 12 weeks. Retinal microvascular structure and function were investigated by analyzing central retinal arteriolar (CRAE) and venular (CRVE) diameter equivalents, the arteriolar-to-venular diameter ratio (AVR), and the dynamic arteriolar (aFID) and venular (vFID) flicker light-induced dilation response.
resultsTwenty patients (mean age 70 ± 9 years) were included in the final analysis. After HIIT, AVR increased (0.80 ± 0.03 vs. 0.83 ± 0.04, p = 0.03) due to arteriolar widening. CRAE increased (157 ± 18 µm vs. 164 ± 18 µm, p = 0.05), but CRVE did not change (196 ± 27 µm vs. 197 ± 24 µm, p = 0.56). After MCT, AVR also increased (0.80 ± 0.08 vs. 0.83 ± 0.06, p = 0.02) without significant changes in CRAE (160 ± 19 µm vs. 165 ± 18 µm, p = 0.07) or CRVE (201 ± 14 µm vs. 199 ± 14 µm, p = 0.40). aFID improved after MCT (2.1 ± 1.6% vs. 3.1 ± 1.8%, p = 0.03) but not after the HIIT intervention (2.1 ± 1.7% vs. 2.4 ± 2.1%, p = 0.60). vFID did not statistically significant change neither in the HIIT (4.4 ± 2.2% vs. 3.4 ± 1.9%, p = 0.06) nor in the MCT (4.3 ± 2.2% vs. 5.5 ± 4.1%, p = 0.26) group.
conclusionMCT and HIIT are both adequate therapy options to improve microvascular health in patients with HFpEF.
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