Intraseptal mapping using multipolar catheters was successfully performed in 70% (60 of 86) of patients with suspected LVOT PVCs, proving feasible and highly effective for guiding ablation.
Observational (n=86)
Is intraseptal mapping using multipolar catheters feasible and effective for guiding ablation of suspected LVOT PVCs?
Intraseptal mapping using multipolar catheters is a feasible and highly effective method to guide ablation of LVOT PVCs.
BACKGROUND: Intramyocardial mapping of left ventricular outflow tract (LVOT) premature ventricular complexes (PVCs) via septal coronary venous branches is helpful to define the site of origin (SOO) and guide ablation. The limitation of unipolar far-field signals with wire mapping can be obviated through the use of a multipolar mapping catheter. OBJECTIVES: This study reports our mapping and ablation experience of suspected LVOT PVCs using intraseptal mapping with multipolar catheters. METHODS: Patients with suspected LVOT PVCs in whom intraseptal mapping was attempted using multipolar catheters were included. The V2 S-wave and R-wave pattern break (PB) ratios were calculated using the S-wave or R-wave amplitudes in lead V RESULTS: Of 86 patients, multipolar intraseptal mapping was successfully performed in 60 (70%; 30% female, 53% with prior ablation). PVCs were most commonly mapped to an intramyocardial source and least commonly to the epicardium. For left bundle branch block PVCs, a V CONCLUSIONS: Ablation of LVOT PVCs guided by intraseptal mapping using multipolar catheters is feasible and highly effective. Electrocardiogram predictors of SOO identify patients in whom intraseptal mapping may be useful. Reversal of late potentials with PVCs may represent abnormal substrate in idiopathic PVCs in ostensibly structurally normal hearts.
Yogasundaram et al. (Fri,) conducted a observational in Suspected LVOT PVCs (n=86). Intraseptal mapping using multipolar catheters was evaluated on Successful multipolar intraseptal mapping. Intraseptal mapping using multipolar catheters was successfully performed in 70% (60 of 86) of patients with suspected LVOT PVCs, proving feasible and highly effective for guiding ablation.