Lin, Lung-ChunLung-ChunLinHSIEN-LI KAOCHAU-CHUNG WUYI-LWUN HOLee Y.-T.2020-03-042020-03-0420010301-5629https://www.scopus.com/inward/record.uri?eid=2-s2.0-0034812883&doi=10.1016%2fS0301-5629%2801%2900422-7&partnerID=40&md5=5255b6701ef62a35e330a711009e12fdhttps://scholars.lib.ntu.edu.tw/handle/123456789/469846We conducted a study to delineate the alterations in the cyclic changes of myocardial ultrasonic integrated backscatter (IBS) in patients receiving angioplasty for chronic coronary artery disease. Ultrasonic tissue characterization (UTC) and dobutamine stress echocardiography were performed in 43 patients before and 24 h after angioplasty, as well as before the follow-up angiography 3 months later. For segments being normokinetic with ischemic burden, the blunted amplitude and increased nadir deviation of IBS cyclic modulation recovered soon after angioplasty. For dyssynergic segments with contractile reserve, the angioplasty rebuilt the amplitude before the wall motion recovered, but corrected the nadir deviation tardily. In both circumstances, the coronary restenosis abolished the initial restoration. Those nonviable segments persistently revealed large deviations and small weighted amplitudes irrelevant to coronary lesions. The progress of myocardial ischemia, the development of wall motion dyssynergy and, then, the loss of viability, show different patterns of alterations in UTC after alleviating coronary obstructions. Copyright ? 2001 World Federation for Ultrasound in Medicine & Biology.[SDGs]SDG3Cardiology; Echocardiography; Patient monitoring; Tissue; Ultrasonic Tissue Characterizations (UTCs); Diseases; dobutamine; angiography; article; coronary artery dilatation; coronary artery disease; female; follow up; human; major clinical study; male; priority journal; restenosis; stress echocardiography; Aged; Angioplasty; Chronic Disease; Coronary Angiography; Coronary Arteriosclerosis; Coronary Restenosis; Cross-Sectional Studies; Echocardiography; Echocardiography, Stress; Female; Humans; Male; Middle Aged; Myocardial Contraction; Myocardial Ischemiajournal article10.1016/S0301-5629(01)00422-7115973592-s2.0-0034812883