N'cho-Mottoh M.-P.,Service Of Medecine Hospitalisation Of Linstitut Of Cardiologie |
Kouame-Koutouan A.,Felix Houphouet-Boigny University |
Anzouan-Kacou J.-B.,Service Des Explorations Fonctionnelles Of Linstitut Of Cardiologie |
Traore F.,Service Of Medecine Hospitalisation Of Linstitut Of Cardiologie |
And 6 more authors.
Aim and interest of the study: This preliminary study was designed to evaluate cardiac Doppler, the physiological sequence of contraction and ventricular relaxation. It was conducted for the feasibility of a future pluridisciplinary study on cardiac scintigraphy. Patients and method: Fifty healthy subjects were recruited for a period of three months. From the onset of the QRS complex, time to the onset and time to the peak of aortic systolic velocity and pulmonary systolic velocity were measured by pulsed flow Doppler. From the onset of the QRS complex, time to the onset and time to the peak of mitral annulus systolic and early diastolic velocities were measured by Doppler tissue imaging. Same measurements were performed to the tricuspid annulus. Results: The right ventricular ejection started earlier than left ventricular ejection. However, the peak left ventricular ejection was reached faster than the peak right ventricular ejection. Ventricular relaxation began earlier in the right ventricle on the analysis of diastolic tissue velocity. Conclusion: Left and right ventricles were highly synchronized by both imaging modalities and concordance with electrical activation showed the reliability of Doppler for the study of contraction and relaxation interventricular synchronicity. © 2014 Elsevier Masson SAS. Source