Key result
Combined cryo- and RF-catheter ablation for SVTs near the normal conduction system achieved a 78% cumulative freedom from SVT rate at 30 days.
Why the study?
There are limited data on outcomes of combined cryo- and radiofrequency-catheter ablation for various SVTs originating near the normal conduction system.
Observational (n=54)
No
Combined cryo- and RF-catheter ablation is a clinically effective strategy for treating SVTs located near the normal conduction system, achieving a 78% freedom from SVT at 30 days.
Answers are grounded in this paper and cite their sources.
May support feasibility of combined cryo-RF ablation for high-risk SVTs; leaves open need for prospective randomized data.
BACKGROUND: There are few data regarding the outcome of a combined cryo- and radiofrequency (RF)-catheter ablation of various types of supraventricular tachycardias (SVTs) originating from near the normal conduction system. METHODS: We analyzed all patients undergoing combined cryo- and RF- catheter ablation at Mayo Clinic, Rochester, MN as part of the ablation of SVTs with potential risks of injury to the normal conduction system. This study aimed to assess the outcome of a combined cryo- and RF-catheter ablation of various types of SVTs. RESULTS: The study population consisted of 54 patients (38 ± 17 years, 32 men). A combined cryo- and RF-catheter ablation was attempted for septal accessary pathways (APs) in 26, atrioventricular nodal reentrant tachycardia (AVNRT) in 14, atrial tachycardia (AT) in 7, and junctional ectopic tachycardia in 7 patients. Forty-one patients (76%) were successfully ablated with cryoablation, and RF ablation after an unsuccessful cryoablation ablated the SVTs successfully at the same location in 6 patients (11%). Complication occurred in 1 patient (deep vein thrombosis). The cumulative freedom from SVT rate at 30 days after the procedure was 78% and there was no significant difference in the recurrence rate among the SVTs. CONCLUSION: A combined cryo- and RF-catheter ablation is clinically effective in patients undergoing SVT ablation with the potential risk of injury to the normal conduction system.
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Miyamoto et al. (2019) conducted an observational in Supraventricular tachycardias (SVTs) originating near the normal conduction system (n=54). Combined cryo- and radiofrequency (RF)-catheter ablation was evaluated on Cumulative freedom from SVT rate at 30 days. Combined cryo- and RF-catheter ablation for SVTs near the normal conduction system achieved a 78% cumulative freedom from SVT rate at 30 days.
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