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• W2982025475 abstract "Abstract Introduction The pathophysiology of HFpEF is complicated and treatments that improve outcomes in HFrEF have no substantial benefits in HFpEF. Impairments in LV global longitudinal strain (GLS) and LV diastolic function parameters have been regarded as novel echocardiographic markers to predict cardiovascular events in HFpEF. Preliminary trials indicate that iloprost, an inhaled prostacyclin analougue, improves exercise hemodynamics in both patients with pulmonary artery hypertension and pulmonary hypertension associated with HFpEF. Purpose We aim to investigate the impact of inhaled iloprost on LV global longitudinal strain, LV diastolic function and RV function during exercise in HFpEF population. Methods 34 patients diagnosed with HFpEF were included with exclusion of severe pulmonary, coronary artery, valvular heart and pericardial diseases. Subjects were randomized 1:1 to inhalation of iloprost or placebo. Transthoracic echocardiography was performed at rest and after 6-minute supine bicycle exercise at 20-Watt workload. We utilized tissue speckle tracking by QLAB software to derive LV GLS and global strain rate during LV isovolumetric relaxation period (SRIVR). E/e', E/SRIVR, tricuspid regurgitation pressure gradient (TRPG), tissue Doppler imaging of RV lateral tricuspid annulus and tricuspid annular plane systolic excursion (TAPSE) were measured to evaluate changes of myocardial performance. Results LV GLS during exercise significantly enhanced after iloprost use. E/SRIVR, a novel predictor of LV filling pressure, was significantly decreased. E/e' was also lower in iloprost group by trend. Improvements in RV function and degree of pulmonary hypertension during exercise with iloprost were observed in this study. Echocardiographic myocardial function endpoints during 20-Watt excercise between iloprost and placebo groups Iloprost (N=17) Placebo (N=17) P value LV global longitudinal strain, % −4.96±1.20 −0.75±3.00 <0.001 E/SRIVR, cm 206.41±113.55 454.13±262.98 0.005 E/e' mean 10.77±2.39 14.41±12.14 0.235 TAPSE, cm 2.62±0.62 2.37±0.56 0.221 TRPG, mmHg 28.37±12.47 44.25±9.29 <0.001 TDI lateral tricuspid annulus, cm/s 16.41±4.61 14.77±2.92 0.222 Effects of iloprost at rest and exercise Conclusions Our study is the first to demonstrate that, in patients with HFpEF, inhaled iloprost favorably enhances LV GLS reserves, decreases LV diastolic filling load, reduces pulmonary hypertension and thereby improves RV function during exercise. Acknowledgement/Funding This work was supported in part by the National Science Council of the Republic of China, Taiwan (NSC107-2314-B-002-265-MY3)" @default.
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• W2982025475 date "2019-10-01" @default.
• W2982025475 modified "2023-09-27" @default.
• W2982025475 title "P2602Inhaled iloprost improves echocardiographic myocardial performance during exercise in heart failure with preserved ejection fraction" @default.
• W2982025475 doi "https://doi.org/10.1093/eurheartj/ehz748.0926" @default.
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