Original Article

Relationship between color-coded anatomical M-Mode, strain imaging, and tissue Doppler imaging (TDI) in the assessment of myocardial asynchrony in normal subjects

Abstract

Purpose: The aim of the study was to compare the time to peak systolic contraction time (Tc) by color-coded anatomical M-mode (AMM), time to peak systolic strain (Tst) by strain rate imaging (SRI), and the time to peak systolic velocity (Ts) by tissue Doppler imaging (TDI) in the left ventricular (LV) and right ventricular (RV) segments of normal subjects. We also sought to determine the relationship between these methods for defining asynchrony indices in normal subjects.

Methods: Conventional echocardiography, color-coded AMM, SRI, and TDI were performed on 44 healthy adult volunteers (in Tehran heart center and Dr. Shariati hospital) to measure Tc, Tst, and Ts for 12 LV and 2 RV segments in the mid and basal levels. Additionally, the delay and the standard deviation (SD) were measured in all 12 and basal LV segments.

Results: In 12 LV and 2 RV segments, Tc by AMM and Tst by SRI were significantly higher than Ts by TDI (P < 0.001). Tc and Tst had no significant differences in 8 LV and 2 RV segments (P < 0.05); however, there were meaningful differences between Tc and Tst only in the anterior and inferior walls. There was a moderate correlation between AMM and SRI for asynchrony in all and basal LV segments and the SD of all and basal LV segments. There was no correlation between AMM and TDI in defining asynchrony indices. There was a weak correlation between TDI and SRI apropos of asynchrony in all and basal LV segments and the SD of all and basal LV segments.

Conclusion: Tc by AMM and Tst by SRI were significantly higher than Ts by TDI in LV and RV segments. There was no correlation between AMM and TDI in defining asynchrony indices.

 

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SectionOriginal Article(s)
Keywords
Anatomical M-Mode; Tissue Doppler Imaging; Asynchrony; Strain Rate Imaging; Normal Heart
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Masoumi MA, Lotfi Tokaldany masoumeh, Sarhangzadeh S, Siavosh P, Sadeghian H. Relationship between color-coded anatomical M-Mode, strain imaging, and tissue Doppler imaging (TDI) in the assessment of myocardial asynchrony in normal subjects. J Tehran Heart Cent. 2024;.