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Iranian Journal of Medical Physics، جلد ۱۱، شماره Issue ۲,۳، صفحات ۲۷۶-۲۸۳
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عنوان انگلیسی Echocardiographic Assessment of Left Ventricle Torsion by Tissue Doppler and Velocity Vector Imaging
چکیده انگلیسی مقاله Introduction Left ventricular (LV) twist is believed to store potential energy and plays an important role in generating diastolic suction. Recent advances in echocardiography techniques have allowed quantification of LV twist. The aim of the present study was to compare LV twist and torsion in healthy human subjects determined by velocity vector imaging (VVI) and tissue Doppler imaging (TDI) at rest. Materials and Methods All volunteers (72 healthy subjects) underwent complete echocardiographic study and LV torsional parameters were assessed using VVI or TDI methods. LV rotation at apical and basal short-axis levels was calculated throughout cardiac cycle and LV twist was defined as net difference between rotation angles of the two levels. The LV torsion was calculated as the LV twist divided by the LV end-diastolic length. Results Twist degree was significantly lower in the VVI group than the TDI group (11.4±2.4º vs.14.1±3.0º, p< 0.001), but when LV twist was normalized by LV end-diastolic length, there was no statistically significant difference between the two groups (1.9±0.7 º/cm vs. 2.1±0.6 º/cm, p=0.142). Conclusion Normalized LV twist or LV torsion values were comparable for both imaging techniques (TDI and VVI methods). Results suggest that these methods may be interchanged for serial assessment, but needs additional studies and preferably larger populations to confirm it.
کلیدواژه‌های انگلیسی مقاله echocardiography, Left Ventricle, Torsion
نویسندگان مقاله زهرا اجاقی حقیقی | zahra ojaghi haghighi
echocardiography research center, rajaie cardiovascular medical and research center, iran university of medical sciences, tehran, iran

سازمان اصلی تایید شده: دانشگاه علوم پزشکی ایران (Iran university of medical sciences)

آذین alizadehasl | azin alizadehasl
echocardiography research center, rajaie cardiovascular medical and research center, iran university of medical sciences, tehran, iran

سازمان اصلی تایید شده: دانشگاه علوم پزشکی ایران (Iran university of medical sciences)

آتوسا مصطفوی | atoosa mostafavi
echocardiography research center, shariati medical and research center, tehran university of medical sciences, tehran, iran

سازمان اصلی تایید شده: دانشگاه علوم پزشکی تهران (Tehran university of medical sciences)

حسن مولادوست | hassan moladoust
cardiovascular research center, school of medicine, guilan university of medical sciences, rasht, iran

سازمان اصلی تایید شده: دانشگاه علوم پزشکی گیلان (Guilan university of medical sciences)

نسیم نادری | nasim naderi
department of heart failure and transplantation, rajaie cardiovascular medical and research center, iran university of medical sciences, tehran, iran

سازمان اصلی تایید شده: دانشگاه علوم پزشکی ایران (Iran university of medical sciences)

مجید ملکی | majid maleki
echocardiography research center, rajaie cardiovascular medical and research center, iran university of medical sciences, tehran, iran

سازمان اصلی تایید شده: دانشگاه علوم پزشکی ایران (Iran university of medical sciences)

وحید نیک سرشت | vahid nikseresht
cardiovascular research center, school of medicine, guilan university of medical sciences, rasht, iran

سازمان اصلی تایید شده: دانشگاه علوم پزشکی گیلان (Guilan university of medical sciences)

نشانی اینترنتی http://ijmp.mums.ac.ir/article_3103.html
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