Key result
Color Doppler M-mode echocardiography had significantly higher inter- and intraobserver correlation coefficients for assessing septal-to-posterior wall motion delay than conventional M-mode.
Why the study?
Does color Doppler M-mode echocardiography improve the reproducibility of septal-to-posterior wall motion delay measurements compared to conventional gray-scale M-mode?
Observational (n=42)
Does color Doppler M-mode echocardiography improve the reproducibility of septal-to-posterior wall motion delay measurements compared to conventional gray-scale M-mode?
Answers are grounded in this paper and cite their sources.
Color Doppler M-mode echocardiography provides more reproducible measurements of septal-to-posterior wall motion delay than conventional gray-scale M-mode, potentially improving assessment of LV mechanical dyssynchrony.
OBJECTIVE: To compare the reproducibility of conventional gray-scale M-mode to color Doppler M-mode assessment of the septal-to-posterior wall motion delay (SPWMD) which is used as a marker of left ventricular mechanical dyssynchrony. METHODS: Forty-two SPWMD datasets were interpreted by two experienced cardiologists and the inter- and intraobserver correlation coefficients were determined. Subgroup analysis was performed on patients with severe septal wall motion abnormalities. RESULTS: The correlation coefficients were significantly higher in color Doppler M-mode versus traditional M-mode in all subgroups analyzed. CONCLUSIONS: Our findings indicate that the color Doppler technique is more reproducible than conventional gray-scale M-mode technique to assess SPWMD. These findings suggest that the color Doppler M-mode may be a superior marker of the SPWMD measurement and predictor of left ventricular (LV) remodeling after cardiac resynchronization therapy.
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Sorrell et al. (2008) conducted an observational in Left ventricular mechanical dyssynchrony (n=42). Color Doppler M-mode echocardiography vs. Conventional gray-scale M-mode echocardiography was evaluated on Inter- and intraobserver correlation coefficients for SPWMD assessment. Color Doppler M-mode echocardiography had significantly higher inter- and intraobserver correlation coefficients for assessing septal-to-posterior wall motion delay than conventional M-mode.
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