https://scholars.lib.ntu.edu.tw/handle/123456789/469856
標題: | Alterations in ultrasonic backscatter during intra-aortic balloon counterpulsation support in patients with acute myocardial infarction | 作者: | YEN BIN LIU CHAU-CHUNG WU Lin L.-C. YI-LWUN HO HSIEN-LI KAO Lee Y.-T. |
公開日期: | 1999 | 出版社: | Elsevier Science Ltd, Exeter, United Kingdom | 卷: | 25 | 期: | 8 | 起(迄)頁: | 1185-1193 | 來源出版物: | Ultrasound in Medicine and Biology | 摘要: | Alterations of ultrasonic backscatter parameters have been evident in humans with myocardial infarction or ischemia. The backscatter variability could be restored in ischemic or stunned myocardium after reperfusion. The aims of this study were to determinate changes in regional myocardial ultrasonic backscatter during intra-aortic balloon counterpulsation (IABP) support in patients with acute myocardial infarction (AMI), and to evaluate whether backscatter imaging could be a functional guide of IABP support. A total of 9 patients with AMI were investigated during IABP support with a two-dimensional (2-D) ultrasonic backscatter imaging approach for parasternal short-axis view. Coronary angiography was performed in 6 of the 9 patients. A total of 21 vessel territories were studied in different modes of IABP support: 1:1, 1:2 and standby. Restoration of cyclic variation of backscatter after IABP support was demonstrated in 10 vessel territories. Failure of restoration of cyclic variation of backscatter after IABP support was noted in 6 vessel territories with severe coronary lesions (total or nearly total occlusion) or scar tissue. No changes of the ultrasonic backscatter were found in nonischemic vessel territories with patent coronary arteries or TIMI III coronary flow. In addition, the wall motion score did not change significantly with different IABP support. These results suggest that IABP could restore the cyclic variation of backscatter in ischemic myocardium. Myocardial anisotropy may play an influential role in the alterations of ultrasonic backscatter. We propose that ultrasonic backscatter could be a noninvasively functional guide of IABP use in patients with AMI. Copyright (C) 1999 World Federation for Ultrasound in Medicine and Biology.Alterations of ultrasonic backscatter parameters have been evident in humans with myocardial infarction or ischemia. The backscatter variability could be restored in ischemic or stunned myocardium after reperfusion. The aims of this study were to determinate changes in regional myocardial ultrasonic backscatter during intra-aortic balloon counterpulsation (IABP) support in patients with acute myocardial infarction (AMI), and to evaluate whether backscatter imaging could be a functional guide of IABP support. A total of 9 patients with AMI were investigated during IABP support with a two-dimensional (2-D) ultrasonic backscatter imaging approach for parasternal short-axis view. Coronary angiography was performed in 6 of the 9 patients. A total of 21 vessel territories were studied in different modes of IABP support: 1:1, 1:2 and standby. Restoration of cyclic variation of backscatter after IABP support was demonstrated in 10 vessel territories. Failure of restoration of cyclic variation of backscatter after IABP support was noted in 6 vessel territories with severe coronary lesions (total or nearly total occlusion) or scar tissue. No changes of the ultrasonic backscatter were found in nonischemic vessel territories with patent coronary arteries or TIMI III coronary flow. In addition, the wall motion score did not change significantly with different IABP support. These results suggest that IABP could restore the cyclic variation of backscatter in ischemic myocardium. Myocardial anisotropy may play an influential role in the alterations of ultrasonic backscatter. We propose that ultrasonic backscatter could be a noninvasively functional guide of IABP use in patients with AMI. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-0032832106&doi=10.1016%2fS0301-5629%2899%2900072-1&partnerID=40&md5=b92415abca2c6040aef1114682116ed4 https://scholars.lib.ntu.edu.tw/handle/123456789/469856 |
ISSN: | 0301-5629 | DOI: | 10.1016/S0301-5629(99)00072-1 | SDG/關鍵字: | Acoustic wave backscattering; Angiocardiography; Blood vessels; Cardiology; Noninvasive medical procedures; Ultrasonic scattering; Intra-aortic balloon counterpulsation; Ultrasonic backscattering; Ultrasonic imaging; acute heart infarction; adult; aged; angiocardiography; anisotropy; aorta balloon; article; clinical article; clinical trial; coronary artery blood flow; counterpulsation; echography; female; heart muscle ischemia; human; imaging; male; priority journal; radiation scattering; ultrasound; Aged; Coronary Angiography; Echocardiography; Female; Humans; Intra-Aortic Balloon Pumping; Male; Myocardial Contraction; Myocardial Infarction; Reproducibility of Results |
顯示於: | 醫學教育暨生醫倫理學科所 |
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