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| Two-dimensional strain for evaluating right ventricular systolic function after interventional therapy of patent ductus arteriosus in Tibetan children |
| BAI Shengyao1,2,WU Xiaoxia2,ZHANG Xuemei2,LIU Huiliang2 |
| 1. Hebei Medical University, Shijiazhuang 050030, China; 2. Cardiovascular Department, 3. Ultrasonography Department, General Hospital of Chinese People’s Armed Police Forces, Beijing 100039, China |
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Abstract Objective To study the right ventricular systolic function after interventional closure of patent ductus arteriosus in Tibetan children by two-dimensional strain imaging technique. Methods The sample consisted of thirty-one PDA children in the Tibetan region. The TEE was in stable condition one day before and seven days after closure. The other twenty children were recruited as control group. More than three continuous cardiac cycles were taken and induced into Echo PAC before the curve of systole peak strain was obtained. Results The strain of the septal and right ventricular wall was lower than that in control group before closure. There was no difference in septal segments between Tibetan and control group after closure, but the strain in the Tibetan group was still lower than that in control group in the right ventricular wall after closure（P<0.01）. The strain of the basal and middle ventricular septal and basal and middle right ventricular wall increased（P<0.01），as in the right ventricular wall（P<0.05）. Apical ventricular septal strain increased but the difference was not statistically significant. Conclusions Myocardial systolic function of the right ventricular wall cannot be restored quickly after closure, so a long period of follow-up is required. Two-dimensional technique can quantitatively evaluate the myocardial contraction in PDA patients and is more sensitive than the value of EF.
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Received: 18 January 2012
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2013, Vol. 24 
