Question special

Patient # 4 and 5 in the study had multiple induced VTs. This is not uncommon, especially, in patients with failed antiarrhythmics and prior ablation. How do you address this issue? Let's say if ECGI and other imaging shows VT origins from 3-4 distinct areas, can they all be treated in the same sitting? What is the maximum ablation volume you can target in one procedure? You used 25Gy here. Is there an upper limit for how much can be delivered (In Gy) in one procedure? Are multiple radioablations feasible?