کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
2963588 | 1178567 | 2010 | 9 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Test–re-test reproducibility of Doppler echocardiography for assessment of electromechanical dyssynchrony: Implications for heart failure clinic Test–re-test reproducibility of Doppler echocardiography for assessment of electromechanical dyssynchrony: Implications for heart failure clinic](/preview/png/2963588.png)
SummaryBackgroundReproducibility of Doppler echocardiography for assessment of inter-ventricular and intra-left ventricular (LV) dyssynchrony, and its clinical implications, have not been established.MethodsTwenty-eight subjects (heart failure stages A–C, 61% with QRS ≥ 120 ms, ejection fraction (EF) ≤35%) underwent two consecutive echo-studies within 24 h to evaluate test–re-test reproducibility of inter-ventricular electromechanical delay (VV delay, by traditional pulsed-Doppler), and intra-LV electromechanical delay between opposite LV walls by color-coded Doppler tissue-velocity (COLOR-DTI), and by pulsed-Doppler tissue spectrum (PW-DTI). Reproducibility of LV internal diastolic diameter (LVIDD) and of EF (by Simpson's method) assessments was evaluated contextually for reference.ResultsIntra-study and inter-study reproducibility of inter-ventricular and intra-LV electromechanical dyssynchrony was in general good, and comparable to the reproducibility of LVIDD and EF assessments. Between-study reproducibility of PW-TDI method was fair, but showed poor agreement with COLOR-TDI method. In repeated studies, agreement of significant electromechanical delay by COLOR-TDI was comparable to the agreement of EF ≤ 35%. In the 5 patients who had simultaneously large QRS, EF ≤ 35%, and significant inter- and intra-ventricular dyssynchrony at study #1, 3 had EF 36–40% and 1 showed no significant dyssynchrony by study #2.ConclusionIn serial echocardiographic studies, Doppler echocardiography showed a good test–re-test reproducibility for the identification of significant electromechanical delay. Planimetry for EF assessment was a source of variability as relevant as Doppler echocardiography, but COLOR-DTI may add meaningful and reproducible information to QRS duration for cardiac-resynchronization therapy.
Journal: Journal of Cardiology - Volume 56, Issue 3, November 2010, Pages 271–279