1. Articles from Ryo Ataka

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    1. Direct comparison of optical coherence tomography and high-definition 60-MHz intravascular ultrasound imaging of intra-procedural stent thrombosis in a patient with acute coronary syndrome

      Direct comparison of optical coherence tomography and high-definition 60-MHz intravascular ultrasound imaging of intra-procedural stent thrombosis in a patient with acute coronary syndrome

      An 80-year-old man with ST-segment elevation myocardial infraction underwent coronary stenting using an everolimus-eluting stent, which resulted in a good coronary flow with no residual stenosis. However, 10 min after final coronary angiography, the patient complained of chest discomfort and the ECG again showed ST elevation. Repeat coronary angiography revealed multiple contrast filling defects in the stent. High-definition 60-MHz intravascular ultrasound (IVUS) examination showed multiple low echoic structures inside the stent, though its visualization was not clear. We also conducted optical coherence tomography (OCT) for further investigation, which clearly delineated the outline of the thrombus. An additional balloon dilatation was ...

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