Publications by authors named "Koichiro Yamaoka"
Article Synopsis
- The study investigates a new method using omnipolar technology to visualize the slow pathway potential, which is important for treating a specific type of heart arrhythmia.
- Researchers enrolled 37 patients with atrioventricular nodal reentrant tachycardia and compared outcomes between those treated using a peak frequency map and those who received the standard approach.
- Findings showed that targeting high-frequency sites near the tricuspid annulus resulted in significantly better ablation success rates, faster recovery times, and higher efficiency compared to traditional methods.
Trans-aortic mitral isthmus ablation after surgical patch closure for an atrial septal defect.
J Cardiovasc Electrophysiol
February 2024
Article Synopsis
- Patients with prior atrial septal defect (ASD) closure who experience atrial tachyarrhythmias face challenges with transseptal puncture procedures.
- A case study details a 65-year-old man who, after undergoing various heart procedures, developed atrial tachycardia (AT) and was successfully treated with a trans-aortic approach for linear ablation of the mitral isthmus (MI).
- The findings suggest that transaortic MI linear ablation is a safe and effective option for patients with ASD closure when traditional puncture methods are difficult.
A 72-year-old man was treated for recurrent atrial tachycardia (AT) and underwent ablation. The AT was diagnosed as bi-AT based on the activation map and the postpacing interval. Another AT appeared and was diagnosed as bi-AT by the same method.
View Article and Find Full Text PDFLeft atrial macroreentrant tachycardia via Bachmann bundle revealed by epicardial mapping.
J Cardiovasc Electrophysiol
November 2022
Although it is common for bi-atrial tachycardia (AT) circuits to include the Bachmann bundle, there are few reports of its role in left AT circuits. A 77-year-old man was admitted for recurrent AT with a cycle length of 425 ms. The endocardial and epicardial activation map revealed an AT circuit located in the left atrial anterior wall and transverse pericardial sinus, showing a centrifugal pattern stemming from the left atrial appendage.
View Article and Find Full Text PDFArticle Synopsis
- Excimer laser coronary atherectomy (ELCA) is a treatment for removing blood clots in patients with acute myocardial infarction (AMI) and may reduce in-hospital mortality compared to conventional treatments.
- In a study involving 104 patients treated with ELCA and 89 with conventional methods, the in-hospital mortality rate was significantly lower in the ELCA group (2.9% vs. 13.5%).
- Key predictors of in-hospital mortality included the use of ELCA, presence of dyslipidemia, shock, and patients’ left ventricular ejection fraction, suggesting ELCA’s effectiveness in improving outcomes during the drug-eluting stent era.
Background: Different subtypes of ischemic stroke may have different risk factors, clinical features, and prognoses. This study investigated the incidence and mode of stroke recurrence in patients with a history of stroke who underwent atrial fibrillation (AF) ablation.
Methods: Of 825 patients who underwent AF ablation from 2006 to 2016, 77 patients (9.