医学
心脏病学
内科学
射血分数
心力衰竭
心房颤动
二尖瓣反流
肺楔压
射血分数保留的心力衰竭
冲程容积
肺动脉
肺动脉高压
劳累
血流动力学
作者
Tomonari Harada,Jwan A. Naser,Atsushi Tada,Shuníchi Doi,Tatsuro Ibe,Sorin V. Pislaru,Mackram F. Eleid,Hidemi Sorimachi,Masaru Obokata,Yogesh N.V. Reddy,Barry A. Borlaug
摘要
Aims This study aimed to evaluate the clinical significance of secondary mitral regurgitation (MR) in patients with heart failure with preserved ejection fraction (HFpEF). Methods and results We conducted a prospective study enrolling consecutively evaluated patients with HFpEF undergoing invasive haemodynamic exercise testing with simultaneous echocardiography. Compared to HFpEF without MR ( n = 145, 79.7%), those with mild or moderate MR ( n = 37, 20.3%) were older, more likely to be women, had more left ventricular (LV) systolic dysfunction, and more likely to have left atrial (LA) myopathy reflected by greater burden of atrial fibrillation, more LA dilatation, and poorer LA function. Pulmonary artery (PA) wedge pressure was higher at rest in HFpEF with MR (17 ± 5 mmHg vs. 20 ± 5 mmHg, p = 0.005), but there was no difference with exercise. At rest, only 2 (1.1%) patients had moderate MR, and none developed severe MR. Pulmonary vascular resistance was higher, and right ventricular (RV)‐PA coupling was more impaired in patients with HFpEF and MR at rest and exercise. LV and LA myocardial dysfunction remained more severe in patients with MR during stress compared to those without MR, characterized by greater LA dilatation during all stages of exertion, lower LA emptying fraction and compliance, steeper and rightward‐shifted LA pressure–volume relationships, and reduced LV longitudinal contractile function. Conclusions Patients with HFpEF and mild or moderate MR have more severe LV systolic dysfunction, LA myopathy, RV‐PA uncoupling, and more severe pulmonary vascular disease. Mitral valve incompetence in this setting is a phenotypic marker of more advanced disease but is not a causal factor in development of HFpEF.
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