Publications by authors named "Tetsumin Lee"

Eruptive calcified nodules (CNs) are a manifestation of severely calcified plaques, which exist in acute coronary syndrome (ACS), non-ACS lesions. Optical coherence tomography is crucial for diagnosing and treating eruptive CNs in clinical practice. Management of eruptive CNs is still a challenge for interventional cardiologists.

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Background: Debulking devices are often followed by a scoring or cutting balloon in percutaneous coronary intervention (PCI) for severely calcified lesions. However, there are limited data on balloon preparation after orbital atherectomy (OA) assessed using optical coherence tomography (OCT).

Aim: We aimed to compare the effects of a novel scoring and cutting balloon on calcified coronary lesions with OCT.

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Background: There are limited data about determinant factors of target lesion failure (TLF) in lesions after percutaneous coronary intervention (PCI) using a drug-coated balloon (DCB) for de novo coronary artery lesions, including optical coherence tomography (OCT) findings.

Aims: The present study aims to investigate the associated factors of TLF in de novo coronary artery lesions with DCB treatment.

Methods: We retrospectively enrolled 328 de novo coronary artery lesions in 328 patients who had undergone PCI with a DCB.

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Background: Percutaneous coronary intervention (PCI) for calcified coronary artery remains challenging in the drug-eluting stent (DES) era. While recent studies reported the efficacy of orbital atherectomy (OA) combined with DES for calcified lesion, the effectiveness of drug-coated balloon (DCB) following OA has not been fully elucidated.

Methods: Between June 2018 and June 2021, 135 patients who received PCI for calcified de novo coronary lesions with OA were enrolled and divided into two groups; OA followed by DCB (n = 43) if the target lesion achieved acceptable preparation, or second- or third-generation DESs (n = 92) if the target lesion showed suboptimal preparation between June 2018 and June 2021.

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Purpose: The association between the extent of the wire and device bias as assessed by optical coherence tomography (OCT) in the healthy portion of the vessel and the risk of coronary artery injury after orbital atherectomy (OA) has not been fully elucidated. Thus, purpose of this study is to investigate the association between pre-OA OCT findings and post-OA coronary artery injury by OCT.

Methods: We enrolled 148 de novo lesions having calcified lesion required OA (max Ca angle > 90°) in 135 patients who underwent both pre- and post-OA OCT.

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Acute myocarditis is a rare but serious complication associated with mRNA-based coronavirus disease 2019 (COVID-19) vaccination. In this article, four COVID-19 mRNA vaccination induced myocarditis cases managed at our tertiary Medical Center have been discussed. Three patients had typical myocarditis.

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Article Synopsis
  • Optical Coherence Tomography (OCT) has evolved as a key imaging tool over the past two decades, significantly improving our understanding of coronary atherosclerosis and optimizing cardiac interventions.
  • Recent advancements in OCT have enabled better identification of plaque pathology and healing processes in patients with acute coronary syndromes, potentially transforming patient management.
  • This Review aims to present the latest insights on cardiac OCT, standardizing its clinical application and interpretation among researchers and clinicians globally.
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Article Synopsis
  • Recent studies show that lipid-rich plaques (LRP) and pericoronary adipose tissue attenuation (PCATA), as assessed by modern imaging techniques, are linked to worse health outcomes in patients with chronic coronary syndromes (CCS).
  • This study analyzed data from 101 CCS patients who underwent two types of imaging (CCTA and NIRS) to explore how well PCATA predicts the presence of LRP alongside traditional CCTA findings.
  • Results indicated a significant relationship between PCATA and LRP, suggesting that adding PCATA to clinical assessments improves the ability to predict adverse events after coronary interventions.
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Background: Although long sinus arrest is occasionally observed during atrial fibrillation (AF) catheter ablation when the fibrillation was terminated, its meaning and prognosis have not yet been clearly elucidated. We hypothesized that sinus node recovery time (SNRT) after termination of AF (time from termination of AF to the earliest sinus node activation) could reflect the extent of atrial remodeling, influencing the formation of non-pulmonary vein (non-PV) triggers and post-ablation outcomes.

Method: The participants were 157 consecutive patients with persistent AF (male: 77.

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Background: The efficacy of direct oral anticoagulants (DOACs) compared with warfarin for the treatment of venous thromboembolism (VTE), and the recurrence of VTE after discontinuation of anticoagulation therapy in research are limited.

Methods and results: This retrospective study enrolled 893 patients with acute VTE between 2011 and 2019. The cohort was divided into the transient risk, unprovoked, continued cancer treatment, and cancer remission groups.

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Background And Aims: Pathologists have shown that intraplaque hemorrhage contributes to plaque destabilization and is frequently co-located with cholesterol crystals (CC). Optical coherence tomography (OCT)-detected low-intensity area without attenuation (LIA) may represent intraplaque hemorrhage. We aimed to examine the prevalence and impact of OCT-detected LIA + CC in untreated non-culprit lesions (NCLs) on subsequent major adverse cardiac events (MACE).

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To examine the outcomes of anticoagulant therapy for patients with venous thromboembolism (VTE) with active cancer and the outcomes after cancer remission with and without anticoagulant therapy. Of the 338 patients with cancer-associated VTE who received anticoagulant therapy, we evaluated therapeutic outcomes over 1 year for 112 patients whose cancers were in remission (cancer remission group) and 226 patients who continued cancer treatment (continued cancer treatment group). Further, the cancer remission group was divided into 89 and 23 patients who completed (completion of anticoagulation group) and continued (continued anticoagulation group) anticoagulant therapy, respectively.

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Low-molecular-weight dextran (LMWD) is considered a safe alternative to contrast media to displace blood during optical coherence tomography (OCT) imaging, but concerns remain. The purpose of this study was to investigate whether using LMWD for OCT protects against kidney injury in patients with renal insufficiency compared with contrast media. We retrospectively identified 474 patients with renal insufficiency (estimated glomerular filtration rate < 60 ml/min/1.

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