A clinical research of left ventricular systolic synchronization in patients with complete right bundle brunch block using velocity vector imaging

doi:10.3877/cma.j.issn.1672-6448.2015.09.005

Abstract

Abstract:

Objective

To analyze the left ventricular synchronicity in patients with complete right bundle brunch block (CRBBB) by velocity vector imaging (VVI), and to provide reliable basis for evaluating left ventricular patho-physiological function changes in patients with CRBBB.

Methods

The left ventricular systolic peak time of longitudinal strain (Tsl), radial strain (Tsr), circumferential strain (Tsc) and the rotation angle (Tra) were obtained by VVI from 31 CRBBB patients and 26 healthy volunteers.

Results

The systolic dyssynchrony indexes of longitudinal (Tsl-SD), radial (Tsr-SD), circumferential (Tsc-SD), and rotational (Tra-SD) motion in 18 segment of left ventricular in CRBBB group and control group were (27.65±6.78) ms vs (26.55±6.99) ms, (32.63±11.82) ms vs (26.63±6.70) ms, (42.81±9.72) ms vs (30.53±8.71) ms, and (37.01±7.73) ms vs (27.67±7.11) ms, respectively. The systolic dyssynchrony indexes of circumferential and rotary motion in the CRBBB group were significantly greater than that in control group, and no significant differences were observed in longitudinal and radial dyssynchrony indexes between two groups (t=4.911, 4.980, both P=0.000).

Conclusions

Compared with control group, left ventricular circumferential and rotary asynchnization index increased in CRBBB group . VVI can reflect the mechanical movement synchrony of left ventricule in various dimensions.

Key words: Velocity vector imaging, Completed right bundle branch block, Ventricular function, left

Guozhi Li, Lixue Yin, Jie Shen, Bin Long, Chongqing Cheng. A clinical research of left ventricular systolic synchronization in patients with complete right bundle brunch block using velocity vector imaging[J]. Chinese Journal of Medical Ultrasound (Electronic Edition), 2015, 12(09): 689-695.

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Figures/Tables 7

References 14

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组别	例数	年龄（岁，±s）	性别（例，男性/女性）	心率（次/min，±s）	体重（kg，±s）	收缩压（mmHg，±s）	舒张压（mmHg，±s）	LVEF（%，±s）	LVEDD（mm，±s）
健康对照组	26	52.55±12.65	18/8	71.46±8.65	63.10±5.37	119.8±9.90	86.09±5.40	68.38±6.13	42.35±3.59
CRBBB组	31	56.87±13.60	22/9	70.87±7.86	65.42±7.23	123.6±7.10	87.38±7.70	66.06±5.89	43.83±3.63
检验值		t=-1.080	χ²=0.020	t=-0.270	t=-0.818	t=-0.585	t=-0.586	t=0.854	t=-0.512
P值		0.281	0.886	0.788	0.219	0.566	0.560	0.397	0.611

组别	例数	年龄（岁，±s）	性别（例，男性/女性）	心率（次/min，±s）	体重（kg，±s）	收缩压（mmHg，±s）	舒张压（mmHg，±s）	LVEF（%，±s）	LVEDD（mm，±s）
健康对照组	26	52.55±12.65	18/8	71.46±8.65	63.10±5.37	119.8±9.90	86.09±5.40	68.38±6.13	42.35±3.59
CRBBB组	31	56.87±13.60	22/9	70.87±7.86	65.42±7.23	123.6±7.10	87.38±7.70	66.06±5.89	43.83±3.63
检验值		t=-1.080	χ²=0.020	t=-0.270	t=-0.818	t=-0.585	t=-0.586	t=0.854	t=-0.512
P值		0.281	0.886	0.788	0.219	0.566	0.560	0.397	0.611

组别	例数	前间隔	前壁	侧壁	后壁	下壁	间隔
健康对照组	26	363.56±40.05	364.13±42.37	371.92±42.79	374.43±39.54	370.87±45.61	370.34±40.47
CRBBB组	31	359.33±47.79	364.45±49.94	368.58±55.05	367.1±53.09	367.2±50.2	354.87±49.52

组别	例数	前间隔	前壁	侧壁	后壁	下壁	间隔
健康对照组	26	363.56±40.05	364.13±42.37	371.92±42.79	374.43±39.54	370.87±45.61	370.34±40.47
CRBBB组	31	359.33±47.79	364.45±49.94	368.58±55.05	367.1±53.09	367.2±50.2	354.87±49.52

组别	例数	前间隔	前壁	侧壁	后壁	下壁	间隔
健康对照组	26	357.03±43.46	358.29±39.08	371.87±42.18	373.55±44.37	373.98±43.03	370.12±44.58
CRBBB组	31	354.11±50.05	354.23±44.18	368.42±48.16	365.66±47.22	356.54±50.08	346.25±45.7

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