Association of CMR-Measured LA Function With Heart Failure Development: Results From the MESA Study

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• 作者：Mohammadali Habibi ; MD^&lowast ; ; Harjit Chahal ; MD^&lowast ; ; Anders Opdahl ; MD ; PhD^&lowast ; ; ^&dagger ; ; Ola Gjesdal ; MD ; PhD^&lowast ; ; ^&dagger ; ; Thomas M. Helle-Valle ; MD ; PhD^&dagger ; ; Susan R. Heckbert ; MD ; PhD^&Dagger ; ; Robyn McClelland ; PhD^§ ; ; Colin Wu ; PhD^鈥?/sup> ; Steven Shea ; MD^¶ ; ; Gregory Hundley ; MD^# ; David A. Bluemke ; MD ; PhD^&lowast ; &lowast ; ; Joã ; o A.C. Lima ; MD^&lowast ; ; ^{jlima@jhmi.edu" class="auth_mail}
• 关键词：feature-tracking MRI ; heart failure ; left atrial function ; left atrial strain
• 刊名：JACC: Cardiovascular Imaging
• 出版年：June 2014
• 年：2014
• 卷：7
• 期：6
• 页码：570-579
• 全文大小：846 K

文摘

The goal of this study was to assess the association between left atrial (LA) volume and function measured with feature-tracking cardiac magnetic resonance (CMR) and development of heart failure (HF) in asymptomatic individuals.

Background

Whether alterations of LA structure and function precede or follow HF development remains incompletely understood. We hypothesized that significant alterations of LA deformation and architecture precede the development of HF in the general population.

Methods

In a case-control study nested in MESA (Multi-Ethnic Study of Atherosclerosis), baseline LA volume and function assessed using CMR feature-tracking were compared between 112 participants with incident HF (mean age 68.4 ± 8.2 years; 66% men) and 224 age- and sex-matched controls (mean age 67.7 ± 8.9 years; 66% men). Participants were followed up for 8 years. All individuals were in normal sinus rhythm at the time of imaging, without any significant valvular abnormalities and free of clinical cardiovascular diseases.

Results

Individuals with incident HF had greater maximal and minimal LA volume indexes (LAVI_min) than control subjects (40 ± 13 mm³/m² vs. 33 ± 10 mm³/m² [p <0.001] for maximal LA index and 25 ± 11 mm³/m² vs. 17 ± 7 mm³/m² [p <0.001] for LAVI_min). The HF case subjects also had smaller global peak longitudinal atrial strain (PLAS) (25 ± 11% vs. 38 ± 16%; p <0.001) and lower LA emptying fraction (40 ± 11% vs. 48 ± 9%; p <0.001) at baseline. After adjustment for traditional cardiovascular risk factors, left ventricular mass, and N-terminal pro–B-type natriuretic peptide, global PLAS (odds ratio: 0.36 per SD [95% confidence interval: 0.22 to 0.60]) and LAVI_min (odds ratio: 1.65 per SD [95% confidence interval: 1.04 to 2.63]) were independently associated with incident HF.

Conclusions

Deteriorations in LA structure and function preceded development of HF. Lower global PLAS and higher LAVI_min, measured using CMR feature-tracking, were independent markers of incident HF in a multiethnic population of asymptomatic individuals.