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It is well known that analysis of spectral tissue Doppler (TD) systolic peak (s’) gives opportunity to assess accurately global and local ventricular myocardial contractility. Unfortunately, not in all cases ultrasound scanners are equipped with TD. Previously we have studied high intensity reflected motion signals (RIMS), which can be easily obtained by conventional spectral Doppler. We have found that systolic component (s) of RIMS can be effectively used for analysis of global ventricular contractility instead of TD. In this study we decided to evaluate if peak s of RIMS can be used for analysis of left ventricular (LV) local myocardial contractility.
20 patients (male –12, female 8, mean age 59.3 ± 4.7 years) with coronary artery disease underwent Doppler echocardiography with registration of TD and RIMS. Apical 4-chamber view was used. s’ and s peaks were recorded from apical lateral segment (TD s’a and RIMS sa) and basal lateral segment (TD s’b and RIMS sb) of LV. For registration of RIMS the sample volume of conventional spectral Doppler was positioned 1 cm outwards LV wall. Strength and direction of linear relationships between peak velocities s and s’ were determined with correlation coefficients (r).
Mean values of TD s’a and RIMS sa were 6.8 ± 1.6 cm/s and 11.0 ± 2.4 cm/s, respectively; correlation coefficient r appeared to be 0.86 (p < 0,05; RIMS sa = 2,5 + 1,2 * TD sa). Mean value of TD s’b was 10.1 ± 2.5 cm/s and of RIMS sb 16.8 ± 3.6 cm/s (r = 0,91; p < 0,05; RIMS sb = 3,2 + 1,3 * TD sb).
Strong direct correlations between homological systolic peaks of TD and RIMS were found in our study. It means that peak s of RIMS can be used for evaluation of local LV myocardial contractility in cases when TD is unavailable.