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| Wen-Hua Du,Xiang Wang,Xiu-Qin Xiong,Tao Li,Hua-Ping Liang.[J].Chin J Traumatol,2015,18(4):223-228. [doi] |
| Role of speckle tracking imaging in the assessment of myocardial regional ventricular function in experimental blunt cardiac injury |
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| DOI： |
| KeyWord: Speckle tracking imagingMyocardial contusionHemodynamicsEchocardiography |
| FundProject: |
| Author Name | Affiliation | | Wen-Hua Du | State Key Laboratory of Trauma, Burns, and Combined Injury, Department of Ultrasound, Daping Hospital and Research Institute of Surgery, the Third Military Medical University | | Xiang Wang | State Key Laboratory of Trauma, Burns, and Combined Injury, Department of Ultrasound, Daping Hospital and Research Institute of Surgery, the Third Military Medical University | | Xiu-Qin Xiong | State Key Laboratory of Trauma, Burns, and Combined Injury, Department of Ultrasound, Daping Hospital and Research Institute of Surgery, the Third Military Medical University | | Tao Li | State Key Laboratory of Trauma, Burns, and Combined Injury, Department of Ultrasound, Daping Hospital and Research Institute of Surgery, the Third Military Medical University | | Hua-Ping Liang | State Key Laboratory of Trauma, Burns, and Combined Injury, Department 1, Daping Hospital and Research Institute of Surgery, the Third Military Medical University |
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| Abstract: |
| Purpose: To evaluate the usefulness and information collecting ability of speckle tracking imaging
techniques in the assessment of myocardial regional ventricular contractility in a rabbit model with blunt cardiac injury.
Methods: Fifteen healthy New Zealand rabbits weighing (2.70±0.28) kg were anesthetized (3%
pentobarbital sodium/i.v) and impacted using the BIM-II biological impact machine to induce myocardial contusion (MC). Hemodynamic parameters, such as heart rate, systolic pressure, mean arterial pressure, diastolic pressure and central venous pressure, were determined before and after MC. Further, parameters reflecting left ventricular functions, such as left ventricular end systolic pressure, left ventricular end diastolic pressure, isovolumic pressure (IP) and the maximal increasing/decreasing rate of left intraventricular pressure (±dp/dtmax), were also determined before and after MC. Left ventricular functions were determined either by two dimensional transthoracic echocardiography or by speckle tracking imaging for segmental abnormal ventricular wall motions.
Results: Heart rate, systolic pressure, diastolic pressure and mean arterial pressure decreased significantly but transiently, while central venous pressure markedly increased after MC. In contrast to significant changes in diastolic functions, there was no significant change in cardiac systolic functions after MC. The speckle tracking imaging demonstrated that strain values of different myocardial segment significantly decreased post impact, and that of the ventricular segment decreased from segment to segment.
Conclusion: Speckle tracking imaging is useful and informative to assess myocardial regional dysfunctions post MC. |
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