Very-early detection of atrial fibrillation after ablation evaluated by a wearable ECG-patch predicts late blanking period recurrence: Preliminary data from a prospective registry.

Introduction: Atrial fibrillation (AF) ablation represents a safe and effective procedure to restore sinus rhythm. The idea that post-procedural AF episodes - during the blanking period - are not considered treatment failure has been increasingly challenged. The E-Patch, a single-use adhesive electrode, facilitates extended continuous ECG monitoring for 120 h. This pilot study aims to assess the effectiveness of this ambulatory monitoring device and investigate whether very-early AF recurrence correlates with delayed blanking period ablation outcomes. Methods: We conducted a single-center, prospective, longitudinal study, including consecutive post-ablation patients monitored with the E-patch. The ability of the device to continuously record was analyzed, as well as the occurrence of AF episodes during external 7-day loop-recorder in the 2nd-month post-ablation. Results: We included 40 patients, median age 62 years (IQR 56-70). E-Patch monitoring was obtained for a median of 118 h (IQR 112-120), with no discomfort nor interpretation artefacts. Very-early AF recurrence was detected in 11 (27.5 %) patients, with a median AF burden of 7 % (IQR 6 %-33 %). Late-blanking period AF was detected in 13 (33 %) of the external 7-day loop recordings. Of the 11 patients that had very-early AF recurrence, 10 (91 %) had late-blanking AF. Very-early AF detection showed 77 % (95 % CI 64 %-90 %) sensitivity and 96 % (95 % CI 90-100 %) specificity in predicting late-blanking AF, with a non-parametric ROC curve AUC of 0.903 (95 % 0.797--1.0). Conclusion: The E-Patch was able to detect very-early AF during an extended period. Very-early AF detection emerges as a predictor of AF recurrence during the late blanking period post-ablation.

Permanent pacemaker implantation after alcoholic septal ablation induced complete heart block: Long-term impact.

INTRODUCTION AND OBJECTIVES: Patients with hypertrophic obstructive cardiomyopathy (HOCM) that remain symptomatic despite optimized medical therapy often undergo alcohol septal ablation (ASA). One of the most frequent complications is complete heart block (CHB), requiring a permanent pacemaker (PPM) in variable rates of up to 20% of patients. The long-term impact of PPM implantation in these patients remains unclear. This study aimed to evaluate the long-term clinical outcomes in patients who implant PPM after ASA. METHODS: Patients who underwent ASA at a tertiary center were consecutively and prospectively enrolled. Patients with previous PPM or implantable cardio-defibrillator were excluded from this analysis. Patients with and without PPM implantation after ASA were compared based on their baseline characteristics, procedure data and three-year primary endpoint of composite of all-cause mortality and hospitalization and secondary endpoint of composite of all-cause mortality and cardiac cause hospitalization. RESULTS: Between 2009 and 2019, 109 patients underwent ASA, 97 of whom were included in this analysis (68% female, mean age 65.2 years old). 16 patients (16.5%) required PPM implantation for CHB. In these patients, no vascular access, pacemaker pocket or pulmonary parenchyma complications were noted. The baseline characteristics of comorbidities, symptoms, echocardiographic and electrocardiographic findings were identical in the two groups, with higher mean age (70.6±10.0 years vs. 64.1±11.9 years) and lower beta-blocker therapy rate (56% vs. 84%) in the PPM group. Procedure-related data showed higher creatine kinase (CK) peaks in the PPM group (1692 U/L vs. 1243 U/L), with no significant difference in the alcohol dose. At three years after ASA procedure, there were no differences in the primary and secondary endpoints between the two groups. CONCLUSIONS: Permanent pacemaker after ASA induced CHB do not affect long term prognosis in hypertrophic obstructive cardiomyopathy patients.

Intracardiac echocardiography-guided left atrial appendage occlusion: The path to independence.

INTRODUCTION AND OBJECTIVES: Transesophageal echocardiography (TEE) has been the standard method for guiding left atrial appendage occlusion (LAAO) procedures. Recently, intracardiac echocardiography (ICE) has emerged as an alternative to TEE due to several advantages, particularly the avoidance of general anesthesia. This analysis aims to assess the safety, feasibility and efficacy of ICE-guided LAAO procedures. METHODS: We performed a retrospective analysis of ICE-guided LAAO procedures, including a comparison of embolic and bleeding events with the predicted standard scores and a comparison with TEE-guided procedures. RESULTS: A total of 88 patients underwent echocardiography-guided percutaneous LAAO (43 patients with TEE and 45 with ICE), mean age 74.9 years, 68.2% male. In the ICE-guided population, the technical success rate was 93% and the major complication rate was 8.8%. During follow-up, yearly stroke and major bleeding rates were 1.4% and 8.4%, respectively, compared to the 4.0% and 8.7% predicted by the CHA2DS2-VASc and HAS-BLED scores. In the TEE versus ICE analysis (similar baseline characteristics), no statistically significant differences were seen regarding technical success (95.3% vs. 93.3%), procedure-related complications (14.0% vs. 8.9%), device thrombus (2.3% vs. 0%), residual minor peridevice leaks (14.0% vs. 24.4%), one-year all-cause mortality (9.3% vs. 4.4%), stroke (9.3% vs. 2.2%) or major bleeding events (9.3% vs. 11.1%). CONCLUSION: ICE-guided LAAO was a safe and effective therapeutic strategy in a high embolic and bleeding risk population, compared to the event rates predicted by the CHA2DS2-VASc and HAS-BLED scores. The ICE-guided procedure compared well to TEE-guided procedures regarding procedure feasibility, safety, and efficacy.