Background: Optical coherence tomography (OCT) is becoming the standard imaging modality for percutaneous coronary intervention (PCI) because of its high resolution. To perform appropriate OCT-guided PCI, it is necessary to avoid artefacts and obtain high-quality images. We investigated the relationship between artefacts and the viscosity of contrast media, which were used to remove air before OCT imaging catheter was inserted into guiding catheter.
View Article and Find Full Text PDFBackground: Malnutrition is considered a risk factor for cardiovascular disease in patients with chronic kidney disease. However, no in vivo studies have reported on using optical coherence tomography to evaluate the effect of nutritional status on coronary atherosclerosis in hemodialysis patients. We aimed to conduct a detailed analysis of the effect of nutritional status on the coronary arteries in hemodialysis patients.
View Article and Find Full Text PDFFractional flow reserve (FFR) is considered the standard for assessment of the physiological significance of coronary artery stenosis. Intracoronary papaverine (PAP) is the most potent vasodilator used for the achievement of maximal hyperemia. However, its use can provoke ventricular tachycardia (VT) due to excessive QT prolongation.
View Article and Find Full Text PDFBackground: Right ventricular branch compromise (RVBC) following percutaneous coronary intervention (PCI) in patients with acute inferior myocardial infarction (AIMI) is associated with short-term adverse clinical outcomes. Chronic kidney disease (CKD) is also known to be a major risk factor after PCI in AIMI. However, little is known about the impact of RVBC and CKD on long-term prognosis.
View Article and Find Full Text PDFA 46-year-old man complained of chest pain at rest for the past three months. His symptoms gradually exacerbated and were suspected of being due to unstable angina. A coronary angiogram revealed focal tight stenosis at the proximal left anterior descending coronary artery with gross spastic coronary findings.
View Article and Find Full Text PDFBackground: Third-generation drug-eluting-stents (3rd DES) may improve coronary arterial healing and reduce neoatherosclerosis formation. We evaluated post-stent findings and subsequent vascular healing of 3rd DES by comparing to second-generation drug-eluting-stents (2nd DES) at intermediate-term follow-up using optical coherence tomography (OCT).
Method: We evaluated 170 patients with 170 lesions who underwent DES implantation (2nd DES, n = 98; 3rd DES, n = 72) and OCT-guided follow-up examination.
• Modest LV wall thickening is a common phenomenon after reperfusion therapy. • Wall thickening may be due to myocardial interstitial edema and/or hemorrhage. • Marked left ventricular wall thickening can reduce SV.
View Article and Find Full Text PDFRecent studies reported that cardiac troponin elevation after percutaneous coronary intervention is related to adverse cardiac events. Intravascular ultrasound (IVUS) and optical coherence tomography (OCT) are often used to assess lesion characteristics in the coronary arteries. However, little is known about the trend of cardiac troponin elevation after diagnostic invasive intracoronary examination and the prognostic influence.
View Article and Find Full Text PDFBackground: Dual-antiplatelet therapy (DAPT) after second-generation drug-eluting stent (2nd-DES) implantation reduces the risk of stent thrombosis and subsequent ischemic events, with an increase in bleeding risk. Although chronic kidney disease patients have both high ischemic and bleeding events, little is known about both risks during DAPT in hemodialysis (HD) patients.
Methods: From July 2009 to March 2017, we retrospectively analyzed bleeding events and major adverse cardiac and cerebrovascular events (MACCE) in 644 consecutive patients who underwent successful percutaneous coronary intervention (PCI) with 2nd-DES implantation in our institution.
Intravascular ultrasound (IVUS)-derived minimum lumen cross-sectional area (MLA) is useful to predict myocardial ischemia using fractional flow reserve (FFR). Recent studies reported an increase in the intraluminal ultrasonic integrated backscatter (IB) value using IVUS across the coronary artery stenosis (CAS) was significantly correlated with FFR. However, these details have not been fully understood.
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