1. 1-7 of 7
    1. Synergistic mechanism of coincidence of two subacute stent thromboses: Insights from multiple imaging observations

      Synergistic mechanism of coincidence of two subacute stent thromboses: Insights from multiple imaging observations

      In the drug-eluting stent era, stent thrombosis is uncommon but still a life-threatening complication after percutaneous coronary intervention. There are several types of risk factors associated with stent thrombosis, which could work synergistically to produce thrombus. We report the case of subacute stent thrombosis. A 66-year-old male was hospitalized due to ST-segment elevation myocardial infarction and received emergency percutaneous coronary intervention to the obtuse marginal branch and the posterolateral artery. Five days later, he complained of chest pain. Emergency coronary angiography was performed and revealed stent thromboses in both the obtuse marginal branch and the posterolateral artery. Remarkably, in this ...

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    2. ST-elevation myocardial infarction in a 39-year-old patient with “normal” coronary arteries as a thrombotic complication of COVID-19

      ST-elevation myocardial infarction in a 39-year-old patient with “normal” coronary arteries as a thrombotic complication of COVID-19

      We report the case of a 39-year-old male without traditional risk factors for coronary artery disease (CAD), i.e. smoking, hypercholesterolemia, hypertension, diabetes mellitus, familial history of premature CAD, admitted with anterior ST-segment elevation myocardial infarction and concurrent coronavirus disease-2019 infection. Coronary angiography showed high intracoronary thrombus burden and thrombotic occlusion of the proximal segment of left anterior descending artery, while optical coherence tomography revealed intact endothelium after thromboaspiration. Learning objective: : Coronavirus disease-2019 (COVID-19) may predispose to thrombotic complications in both the venous and the arterial circulation. ST-segment elevation myocardial infarction (STEMI), rarely, may be the main clinical presentation of ...

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    3. OCT findings of radiotherapy-induced coronary artery disease: A “two-hit combined hypothesis”

      OCT findings of radiotherapy-induced coronary artery disease: A “two-hit combined hypothesis”

      Radiotherapy-induced coronary artery disease (RT-CAD) is a well-known late complication of anti-neoplastic treatment. Although definitive diagnosis requires standard coronary angiography, modern intracoronary imaging techniques, such as optical coherence tomography (OCT), are able to provide detailed morphological characteristics of RT-CAD lesions. We report the case of a 42-year-old male with a previous history of treated Hodgkin's lymphoma who complained of typical chest pain on minimal exertion. Coronary angiography showed significant 2-vessel disease. Use of OCT documented the fibro-fatty nature of coronary lesions, showing a constrictive pattern, compatible with RT-CAD. The patient underwent successful revascularization of both lesions.

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    4. Successful percutaneous removal of dislodged ring-marker of optical coherence tomography catheter using the twisted wire technique with a guide-extension catheter

      Successful percutaneous removal of dislodged ring-marker of optical coherence tomography catheter using the twisted wire technique with a guide-extension catheter

      An 81-year-old male with diabetes and hypertension was admitted to our hospital due to chest pain on exertion. Coronary angiography revealed a severe stenosis at the middle of right coronary artery (RCA). We performed percutaneous coronary intervention under the guidance of optical coherence tomography (OCT) to the lesion in the middle RCA. After balloon dilations, a drug-eluting stent was deployed to the lesion. Then, OCT examination was performed. At that time, fluoroscopy revealed a foreign body over the 0.014-inch guidewire in the distal RCA, which was the ring-marker of OCT catheter. As RCA blood flow was well preserved, percutaneous ...

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    5. Differences of plaque characterization of high-intensity and non high-intensity plaques on non-contrast T1-weighted magnetic resonance imaging using angioscopy and optical coherence tomography

      Differences of plaque characterization of high-intensity and non high-intensity plaques on non-contrast T1-weighted magnetic resonance imaging using angioscopy and optical coherence tomography

      Coronary high-intensity plaques (HIPs) visualized by non-contrast T1-weighted imaging (T1WI) in cardiac magnetic resonance (CMR) were associated with coronary events. We report a case of a 68-year-old man with an old myocardial infarction. He had undergone CMR to exclude new coronary artery disease, because he sometimes had an atypical chest symptom. The moderate stenosis in the right coronary artery (RCA) showed non HIP on non-contrast T1WI. We observed HIP in the proximal left anterior descending artery (LAD) without significant stenosis. Non HIP lesion in the RCA showed fibrous and calcified plaque without thrombus by optical coherence tomography (OCT) and angioscopy ...

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    6. The impact of three-dimensional optical coherence tomography and kissing-balloon inflation for stent implantation to bifurcation lesion

      The impact of three-dimensional optical coherence tomography and kissing-balloon inflation for stent implantation to bifurcation lesion

      The rates of restenosis and stent thrombosis after the therapeutic stent deployment for bifurcation lesions are still comparably high after the introduction of the new-generation drug-eluting stents (DESs), because of the various factors including their morphology. We experienced a case of a successful percutaneous coronary intervention using three-dimensional optical coherence tomography (3D OCT) with a single stent deployment to a bifurcation lesion of the left anterior descending artery (LAD) and left circumflex artery (LCx) with a following kissing-balloon inflation (KBI). The 3D OCT, after the inflation of the jailed ostium of the LCx following the stent deployment to the LAD ...

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    7. Intravascular findings of fibromuscular dysplasia on optical coherence tomography

      Intravascular findings of fibromuscular dysplasia on optical coherence tomography

      We present the case of a 29-year-old woman with right renal artery stenosis caused by fibromuscular dysplasia (FMD) who underwent optical coherence tomography (OCT)-guided percutaneous transluminal renal angioplasty. Using OCT, we could clearly observe intimal fibroplasia and medial hyperplasia that was indicative of FMD. Based on diagnosis of FMD by OCT, this patient was treated with plain old balloon angioplasty that resulted in adequate luminal opening without intimal dissection confirmed on final angiography and OCT.

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    1-7 of 7
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