Test-re-test reproducibility of Doppler echocardiography for assessment of electromechanical dyssynchrony: implications for heart failure clinic

Journal of cardiology
Vittorio PalmieriAldo Celentano

Abstract

Reproducibility of Doppler echocardiography for assessment of inter-ventricular and intra-left ventricular (LV) dyssynchrony, and its clinical implications, have not been established. Twenty-eight subjects (heart failure stages A-C, 61% with QRS ≥ 120 ms, ejection fraction (EF) ≤ 35%) underwent two consecutive echo-studies within 24h 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. Intra-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 lar...Continue Reading

References

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