Efficacy of HPSD ablation
Temperature controlled high power short duration ablation with 90watts for 4 seconds using the QDot catheter lead to short procedure and RF times, while no major complications occurred. PVI was achieved in all patients. Short-term effectiveness during Adenosine challenge without dormant conduction (DC) was high and DC occurred only in 29% of patients. In the QDot Fast Trial published by Reddy et al. dormant conduction during Adenosine testing was 26.9% (4). Compared to historical data by Mackle et al and Kottmaier et al showing dormant conduction in 58% and 54% respectively using standard power settings a reduction of approximately 25% can be stated (4;10). These data are in line with recently published data stating that HPSD ablation leads to shorter procedure times and better outcomes while remaining safe using standard irrigated tip catheters. Published data stated that using a power controlled ablation mode in HPSD ablation leads to a better lesion to lesion contiguity and a beneficial lesion geometry with larger lesion diameters and less lesion depth (5;11).