Objective To investigate biomechanical characteristics of left ventricular
myocardial deformation in short axis by evaluating short axis systolic strain of left
ventricle in healthy people with normal coronary angiography by using three-dimensional
speckle tracking imaging (3D-STI).Methods There were 24 patients (14 males and 10 females)
with normal coronary enrolled in the study.Toshiba Artida color Doppler was used to collect
and store standard apical four chamber view of left ventricular full volume images.And 3D-
STI online analysis software was used to analyze the group,including:global radial strain
(GRS),global circumferential strain (GCS).Results ① Left ventricular GRS was 30.91% ±
16.19%.GRS of mitral valve level,papillary muscle level were statistically significant
compared with GRS of apex level (P<0.05 or P <0.01).There was no difference in GRS among the
same level of the different walls (P >0.05).② Left ventricular GCS was-29.47% ±
12.46%.Left ventricular GCS increased gradually from the base level to the apex level.Except
septal anterior ventricle,GCS of mitral valve level,papillary muscle level were
statistically significant compared with GCS of the apex level (P <0.05).Conclusions This
study revealed the characteristics of GCS and GRS of the healthy people.
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