The Effect of Percutaneous Coronary Intervention on Left Ventricular Diastolic Dysfunction in Patients with Coronary Artery Disease Assessed by Strain Rate Imaging

Fariba Bayat¹, Elham Farahani^2*, Habibollah Saadat¹

¹Shahid Beheshti University of Medical Sciences, Tehran, Iran.
²Cardiovascular Research Center, Modarres Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran.

DOI: 10.4236/wjcd.2014.410063                

Abstract

Introduction: Coronary artery disease (CAD) is the most common cause for left ventricular dysfunction. Unfortunately, the treatment strategies of regional myocardial diastolic dysfunction in patients with CAD have not been well characterized and benefit of percutaneous coronary intervention (PCI) as a treatment strategy is not clear. So the present study aimed to assess the effects of PCI on regional and global left ventricular diastolic dysfunction in patients with CAD assessed by strain rate (SR) imaging. Methods: Thirty adult symptomatic patients with coronary artery disease that underwent coronary angiography and candidate for PCI on left anterior descending artery were enrolled to our study. Echocardiographic findings and early diastolic SR were measured before and 48 hours after PCI. Results: Mean age of the patients was 59.9 ± 8.3 years. Most of the left ventricular diastolic parameters showed significant difference before and after elective PCI; while mitral E velocity, DT, E/A and pulmonary vein flow before and after PCI did not show significant difference assessed by statically test. Also before PCI, mean (SD) of peak early diastolic SR in ischemic regions (1.89 ± 0.22) was smaller than of non-ischemic regions (2.53 ± 0.26) while after PCI this parameter became similar in ischemic regions (2.55 ± 0.27) and non-ischemic regions (2.55 ± 0.26). Conclusion: Most of the left ventricular diastolic parameters improved after PCI in CAD patients. Also regional myocardial relaxation as measured by peak early diastolic SR (E_SR) in the ischemic segments improved significantly compared with that in non-ischemic segments.

Keywords

Strain Rate, Percutaneous Coronary Intervention, Diastolic Function

Conflicts of Interest

The authors declare no conflicts of interest.

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