کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1761194 | 1019637 | 2010 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Regional Myocardial Function and Response to Acute Afterload Increase in Chronically Anemic Fetal Sheep: Evaluation by Two-Dimensional Strain Echocardiography
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
آکوستیک و فرا صوت
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چکیده انگلیسی
We hypothesized that in chronic fetal anemia, remodeling of the myocardium is related to abnormalities in regional wall motion and acutely increased afterload further disturbs myocardial strain. Chronic anemia was induced in one fetus of each of seven sheep twin pregnancies. The fetuses were studied by two-dimensional (2-D) strain echocardiography at baseline and during increased afterload via angiotensin II (AT II) infusion. At baseline, the peak systolic longitudinal, radial and circumferential strains in the left ventricular lateral wall in anemic fetuses were lower than those in the controls (all p < 0.05). During AT II, the circumferential strain of right ventricular free wall decreased significantly both in the control and anemic fetuses. Left ventricular free wall systolic strains were not affected by AT II. Fetal myocardial remodeling in chronic anemia decreases left ventricular systolic free wall strains. The myocardial adaptation does not change ventricular responses to acutely increased afterload. (E-mail: sahnd@ohsu.edu)
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ultrasound in Medicine & Biology - Volume 36, Issue 12, December 2010, Pages 2042-2047
Journal: Ultrasound in Medicine & Biology - Volume 36, Issue 12, December 2010, Pages 2042-2047
نویسندگان
Li Xiong, Leah S. Bernard, Jason N. Hashima, You-Bin Deng, Zhiwen Zhou, Muhammad Ashraf, A. Roger Hohimer, Lowell E. Davis, Weihui Shentu, David J. Sahn, Juha Rasanen,