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Objective: This study aims to investigate the anatomical variations in femoral vasculature and evaluate the clinical value of ultrasound‐guided femoral vein puncture in catheter ablation procedures. Methods: In this retrospective analysis conducted from January 2023 to March 2023, we examined data from patients who underwent catheter ablation with ultrasound‐guided femoral venipuncture. We evaluated the anatomy of the femoral vasculature at both high and low inguinal levels. Based on the relationship between the femoral vein and artery, we classified the anatomy into four types: Type I (vein parallel to artery without overlap), Type II (vein medial to artery with lumen overlap ≤50%), Type III (vein posterior to artery with lumen overlap > 50%), and Type IV (vein lateral to artery). Additionally, we assessed procedure‐related vascular complications that required interventions or prolonged hospital stays. Results: A total of 254 patients were included in this study. At the upper inguinal level, most cases (92.5%) exhibited Type II, followed by Type I (6.5%), while Type III (0.6%) and IV (0.4%) were less common. At the lower inguinal level, Type II accounted for 70.7%, there was a significantly higher proportion of Type III (23.4%) and Type IV (5.9%). The overall complication rate was 0.4%, no pseudoaneurysm or hematoma was observed in our study. Conclusion: Our study revealed significant anatomical variations in the relationship between the femoral vein and femoral artery. Ultrasound‐guided femoral venipuncture significantly reduced vascular complication rate, making it a valuable tool for guiding puncture procedures. [ABSTRACT FROM AUTHOR]

Background: Intracardiac non-contact mapping provides a rapid and accurate isopotential mapping that facilitates catheter ablation of the ventricular tachyarrhythmias in arrhythmogenic right ventricular cardiomyopathy (ARVC). Methods: Thirty-two consecutive patients (26 men and 6 women, mean 37.2 ± 13.8 years) were treated with ablation. Fourteen patients had a history of syncope/pre-syncope. Two patients had an implantable cardiac defibrillator (ICD) previously implanted. Results: There were 67 ventricular tachycardias (VTs) induced in the 32 patients. The average VT rate was 210 ± 32.2 (130–310) bpm. There were 42 episodes of VT that had a heart rate ≥200 bpm and 24 of the 32 patients (75%) had ≥2 morphologies of VT. Regional ablation was applied by targeting the earliest VT activation sites under the guidance of non-contact mapping. Acute success was achieved in 84.4% (27/32) patients, and significant improvement was seen in 15.6% (5/32) patients as evidenced by a slower rate of VT. None of the patients experienced syncope/pre-syncope or sudden death during the 28.6 ± 16 (9–72) month follow-up. There were no complications of the procedure. At the end of follow-up, 81.3% of the patients were free of VT without medication while the rest of the patients achieved a modified success. Conclusions: The rapid ventricular tachyarrhythmias in ARVC patients can be abolished or improved significantly by regional RF catheter ablation under the guidance of non-contact mapping. There was no sudden cardiac arrest or death in those patients without ICD implantation. Delayed efficacy may occur in some patients after ablation. [ABSTRACT FROM AUTHOR]