Article

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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Langue : ANGLAIS ; FRANCAIS