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Transthoracic Speckle Tracking Echocardiography for the Quantitative Assessment of Left Ventricular Myocardial Deformation
Published on: October 20, 2016
[3-dimensional speckle tracking echocardiography for left ventricular rotation and twist in patients with
Wenhui Zhu1, Yan Tong, Wengang Liu
1Department of Ultrasonography, Third Xiangya Hospital, Central South University, Changsha 410013, China.
Insights
Essential hypertension (EH) affects left ventricular rotation and twist differently based on configuration. Three-dimensional speckle tracking echocardiography (3D-STE) reveals these changes and impacts on systolic function.
Area of Science:
- Cardiology
- Echocardiography
- Hypertension Research
Background:
- Essential hypertension (EH) is a major cardiovascular risk factor.
- Left ventricular (LV) remodeling occurs in EH, altering cardiac mechanics.
- Understanding LV rotation and twist is crucial for assessing systolic function in EH.
Purpose of the Study:
- To analyze left ventricular (LV) rotation and twist characteristics in patients with essential hypertension (EH) across different LV configurations.
- To utilize 3-dimensional speckle tracking echocardiography (3D-STE) for this analysis.
- To correlate these mechanical changes with LV systolic function.
Main Methods:
- 106 EH patients were categorized into four groups: normal configuration (LVN), concentric remodeling (CCR), concentric hypertrophy (CCH), and eccentric hypertrophy (ECH).
- A control group of 30 healthy subjects was included for comparison.
- Key parameters including LV ejection fraction (LVEF), peak basal rotation (Prot-B), peak apical rotation (Prot-A), LV rotation (LV-rot), and LV twist (LV-tw) were measured using 3D-STE.
Main Results:
- Left ventricular mass index was significantly higher in all EH groups compared to controls.
- CCH and CCR groups showed increased LV posterior wall thickness, interventricular septum thickness, and relative wall thickness.
- LVEF was preserved in LVN, CCR, and CCH groups but reduced in the ECH group. LV rotation and twist parameters were elevated in LVN, CCR, and CCH groups but decreased in the ECH group compared to controls.
Conclusions:
- 3D-STE is effective in evaluating left ventricular rotation and twist in EH patients with diverse LV configurations.
- These echocardiographic parameters can reflect alterations in LV systolic function associated with different EH-induced LV remodeling patterns.
- Findings highlight the utility of 3D-STE in characterizing complex mechanical changes in hypertensive heart disease.
Objective:
To analyze the characteristics of left ventricular rotation and twist in patients with essential hypertension (EH) of different left ventricular configurations by 3-dimensional speckle tracking echocardiography (3D-STE).
Methods:
A total of 106 EH patients were divided into 4 groups: a left ventricular normal configuration (LVN) group (n=30), a concentric remodeling (CCR) group (n=31), a concentric hypertrophy (CCH) group (n=29), an eccentric hypertrophy (ECH) group (n=16), and a control group of 30 healthy subjects. The parameters of LVEF, peak basal rotation (Prot-B), peak apical rotation (Prot-A), left ventricular peak apical rotation (LV-rot), and left ventricular peak apical twist (LV-tw) were compared.
Results:
The left ventricular mass index in the EH groups, which kept increasing, was higher than that in the normal control group (P<0.05). Compared with the normal control group, LVN and ECH group, the left ventricular posterior wall thickness, interventricular septum at end-diastole, and relative wall thickness significantly increased in the CCH and CCR group (P<0.05). LVEF showed no significant difference among the normal control, LVN, CCR and CCH group (P>0.05), but LVEF was lower in the ECH group than in other groups (P<0.05). Compared with the normal control group, Prot-B, Prot-A, LVrot and LVtw were significantly higher in the LVN, CCR and CCH group (P<0.05), but decreased in the ECH group (P<0.05).
Conclusion:
3D-STE can evaluate the left ventricular rotation and twist in EH patients with different configurations, and reflect changes in the left ventricular systolic function in EH of different configurations.
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