Effect of cardiac rehabilitation on left atrial functions in patients with acute myocardial infarction.
Ann Phys Rehabil Med 2014;
57:105-13. [PMID:
24582694 DOI:
10.1016/j.rehab.2014.01.001]
[Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2013] [Revised: 01/16/2014] [Accepted: 01/16/2014] [Indexed: 12/01/2022]
Abstract
BACKGROUND
The objective of this study was to analyze the effects of cardiac rehabilitation (CR) on the atrial function of patients with acute myocardial infarction (AMI) who had been successfully revascularized through percutaneous coronary intervention (PCI).
METHODS
Forty-two AMI patients having undergone CR were enrolled in this observational study. Assessments were performed before and after 6 weeks of CR. Left atrial strain analysis was carried out by two-dimensional speckle tracking echocardiography. Left ventricular ejection fraction (LVEF) was measured by the biplane Simpson's method. Pulsed-wave Doppler at the tip of mitral valve leaflets enabled us to measure early (E) and late (A) diastolic filling velocities, deceleration time (DT) of early filling velocity and isovolumic relaxation time (IVRT). Left ventricle tissue velocity was measured by tissue Doppler imaging of the lateral mitral annulus (e') and E/e' was subsequently calculated. Ratio of E/e' to left atrium (LA) peak strain was used to estimate LA stiffness.
RESULTS
Following CR, LVEF (P=0.010), LA strain (P<0.001) and LA stiffness (P=0.013) all showed improvement, while other parameters remained unchanged.
CONCLUSION
Post-AMI cardiac rehabilitation and revascularization by PCI might have favourable effects on LA function.
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