Publications by authors named "Yoon Kee Siow"
Article Synopsis
- - The study investigated the relationship between the distance from the descending aorta to the left inferior pulmonary vein (Dao-LIPV) and the presence of triggers and drivers in atrial fibrillation (AF) during ablation procedures.
- - A total of 886 patients with drug-refractory AF were analyzed; 63 were found to have LIPV triggers or drivers, with Dao-LIPV distance proving to be a strong predictor for these occurrences.
- - The research developed a risk score model indicating that patients with a Dao-LIPV distance of 2.5 mm or less and persistent AF have a significantly higher risk of LIPV triggers or drivers, which can help electrophysiologists plan ablation treatments more effectively.*
Article Synopsis
- Signal-averaged electrocardiography (SAECG) was studied in patients with nonischemic cardiomyopathies (NICMs) to determine its diagnostic and prognostic value regarding ventricular arrhythmia (VA).
- In a study of 58 NICM patients, those who met at least one SAECG criterion showed larger areas of scar tissue and more frequently had extremely low-voltage zones than those who did not meet the criteria.
- The findings suggest that a positive SAECG indicates a greater risk for arrhythmogenic issues in NICM patients, although it did not significantly correlate with long-term recurrence of ventricular arrhythmias.
Catheter ablation in patients with atrial fibrillation and dilated cardiomyopathy.
Front Cardiovasc Med
January 2024
Introduction: Catheter ablation is an effective and safe strategy for treating atrial fibrillation patients. Nevertheless, studies on the long-term outcomes of catheter ablation in patients with dilated cardiomyopathy are limited. This study aimed to assess the electrophysiological characteristics of atrial fibrillation patients with dilated cardiomyopathy and compare the long-term clinical outcomes between patients undergoing catheter ablation and medical therapy.
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- The study examines how catheter ablation (CA) of atrial fibrillation (AF) affects the severity of mitral regurgitation (MR) in patients who have both conditions, analyzing data from 2011 to 2021.
- Of the 50 patients analyzed, those with improved MR after CA (group 1) had fewer risk factors like hypertension and diabetes, and less scar tissue in the left atrium compared to those with refractory MR (group 2).
- The results indicate that while most patients experience improved MR post-ablation, the presence of scar tissue in the posterior bottom of the left atrium predicts a poorer outcome in terms of MR recovery.
Article Synopsis
- This study compares the effectiveness of circumferential pulmonary vein isolation (CPVI) and segmental pulmonary vein isolation (SPVI) in patients undergoing redo ablations for recurrent atrial fibrillation (AF).
- 543 patients who had AF ablation were analyzed, with 141 included in the final assessment; the results showed similar AF-free survival rates for both techniques, but a significant difference in atrial flutter recurrence favoring CPVI.
- The findings suggest that while SPVI and CPVI are comparable for AF recurrence, SPVI has a higher rate of atrial flutter, potentially linked to more residual pulmonary vein gaps over time.