ArticleJournal of cardiology cases2026
High-resolution 8-spline mapping and radiofrequency catheter ablation for middle cardiac vein diverticulum epicardial accessory pathways: Efficacy and safety.
Article in Journal of cardiology cases, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
0 citing papers in PubMed.
No citing paper in PubMed yet.
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
4 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Posteroseptal accessory pathways (APs) often involve epicardial connections, making radiofrequency catheter ablation (RFA) particularly challenging. We present the case of a 14-year-old boy in whom a heart murmur was detected after birth. Echocardiography revealed an isolated ductus arteriosus aneurysm with tricuspid regurgitation, while electrocardiogram (ECG) showed pre-excitation due to an AP. The aneurysm spontaneously closed during infancy. At age 13 years, the patient experienced brief monthly palpitations but did not seek medical treatment. By age 14 years, echocardiography showed reduced cardiac function, and a 12‑lead ECG revealed a posteroseptal AP. Contrast-enhanced computed tomography revealed a small middle cardiac vein (MCV) diverticulum located >5 mm from the right coronary artery. Electrophysiological study (EPS) and RFA were performed to improve cardiac function. Although EPS did not induce atrioventricular reciprocating tachycardia, intracardiac echocardiography and multipolar electrode mapping demonstrated continuous atrioventricular potentials with an AP potential at the MCV diverticulum neck. Low-power radiofrequency energy delivered with a QDOT MICRO™ catheter eliminated AP conduction within 2 s. Follow-up echocardiography confirmed resolution of left ventricular dyssynchrony and improved function. High-resolution electroanatomical mapping enabled precise localization of the AP, and low-power irrigation catheter use provided effective and safe ablation in pediatric posteroseptal AP. Learning objective: The posteroseptal accessory pathway (AP) is a possible epicardial pathway often associated with anatomical abnormalities, such as the coronary sinus diverticula, and radiofrequency catheter ablation (RFA) is technically more challenging in such cases than in other APs. The combined use of a multispline high-resolution electroanatomical mapping catheter and a low-power irrigation catheter enables accurate and safe RFA, even in pediatric patients with an epicardial posteroseptal AP in the middle cardiac vein diverticulum.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.