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RESEARCH ARTICLE
Year : 2015  |  Volume : 3  |  Issue : 1  |  Page : 3

Ventricular dyssynchrony markers in healthy black African subjects: A tissue doppler imaging study


1 Department of Emergency, Abidjan Cardiology Institute, Abidjan, Ivory Coast
2 Hemodynamic Department, Abidjan Cardiology Institute, Abidjan, Ivory Coast
3 Echocardiography Department, Abidjan Cardiology Institute, Abidjan, Ivory Coast

Correspondence Address:
Marie Paule Bernadette N'cho-Mottoh
Department of Emergency, Abidjan Cardiology Institute, Abidjan
Ivory Coast
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Source of Support: None, Conflict of Interest: None


DOI: 10.5812/acvi.24305

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Background: Tissue Doppler is a promising method that allows the measurement of time of systolic and diastolic tissue velocities. Ventricular dyssynchrony was assessed in patients with heart failure. In sub-Saharan Africa, very few studies have focused on ventricular dyssynchrony in healthy subjects. Objectives: The purpose of this study was to measure time-to-peak of systolic and diastolic velocities of different segments of left ventricle and apply ventricular dyssynchrony markers to healthy black African subjects. Patients and Methods: Fifty healthy black African were enrolled consecutively over a period of 3 months. Time-to-peak systolic velocities (TS) and Time-to-peak early diastolic velocities (TE) were measured at the four basal segments of left ventricle. Five dyssynchrony markers were assessed: difference between maximal time-to-peak systolic velocity and minimal time-to-peak systolic velocity, time between septal time-to-peak systolic velocity and lateral time-to peak systolic velocity, standard deviation of time-to-peak systolic velocity of the four basal segments, difference between maximal time-to-peak early diastolic velocity and minimal time-to-peak early diastolic velocity, and standard deviation of time-to-peak early diastolic velocity of the four basal segments. Results: The frequency of some dyssynchrony markers was similar to that of other studies. The difference between maximal time-to-peak systolic velocity and minimal time-to-peak systolic velocity was correlated with age and was higher among women. The prevalence of diastolic dyssynchrony was higher in black African subjects. Conclusions: Large-scale studies on the healthy black African population could assess the relationship between diastolic dyssynchrony and changes in myocardial performance related to racial differences.


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