[Layer-specific Analysis in Patients with ST Segment Elevation Myocardial Infarction].

Sichuan Da Xue Xue Bao Yi Xue Ban

Department of Cardiology, West China Hospital, Sichuan University,Chengdu 610041,China.

Published: September 2016

AI Article Synopsis

  • This study evaluates how left ventricular wall function changes after a heart attack (STEMI) and seeks to identify if measuring specific layers of the heart can predict heart remodeling.
  • Researchers followed 39 STEMI patients who underwent treatment and compared their heart function to 30 healthy individuals using echocardiograms at two points: shortly after treatment and six months later.
  • Results indicated that while there was improvement in heart function over time, the patients still showed lower strain measurements compared to healthy controls, and epicardial strain was identified as a significant predictor for heart remodeling issues following the heart attack.

Article Abstract

Objectives: To evaluate left ventricular wall function after ST segment elevation myocardial infarction(STEMI) by layer-specific analysis and determine if the layer-specific parameters can predict left ventricular remodeling(LVR).

Methods: Thirty nine patients with first STEMI who had successful primary percutaneous coronary intervention(P-PCI) were studied, while 30 healthy individuals were included as normal control. Echocardiographic examinations were performed in STEMI patients within 48 h after P-PCI (before follow-up) and 6 months later (follow-up). Three dimensional cardiac function and longitudinal, circumferential 3-layer strain were analyzed.

Results: In STEMI, longitudinal endocardial strain was higher than epicardial strain (<0.01), circumferential strain decreased from endocardium to epicardium gradually (<0.01). Longitudinal and circumferential 3-layer strain at follow-up was higher than that before follow-up (<0.01), but lower than that in control group( <0.05). LVR group had lower longitudinal and circumferential 3-layer strain (<0.05). Longitudinal epicardial strain was the independent predictor of LVR(odds ratio:3.332,95% confidence interval:1.124-3.882,=0.03), the cut off value of -9% yielded 89.5% sensitivity and 70.2% specificity.

Conclusions: Strain decreased from endocardium to epicardium within 48 h after P-PCI in STEMI. Myocardial function was lower in LVR group. Longitudinal epicardial strain could be employed as an independent predictor of LVR after STEMI.

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