Role of antitachycardia pacing in XXXX with third generation cardioverter defibrillators.

@entity1 @entity943 @entity855 @entity10166
The most effective antitachycardia pacing ( @entity855 ) mode is still a matter of debate. Randomized prospective testing of 3 different @entity855 modes was performed in 65 @entity1 (pts) prior to and after cardioverter defibrillator implantation (Ventak @entity10166 36 pts, Cadence V 100 29 pts). All 3 @entity855 modes included 4 stimulation attempts with 4-7 adaptive scanning burst pulses. Adaptive burst coupling interval was 75% in mode A, 81% in mode B and 69% in mode C. Autodecremental scanning within bursts was 8 msec in all, decremental scanning between bursts was 8 msec in modes B and C. Each @entity855 mode had to be tested 3 times; all 3 @entity855 modes were randomly applied to each pt. During preoperative testing 91 of 133 VT episodes (68%) could be terminated by @entity855 . Termination was achieved in 68% with mode A, 68% with mode B and 73% with mode C. During predischarge testing, 251 VTs were induced and @entity855 was successful in 147 VTs (59%). Termination rate was 56% with mode A, 68% with mode B and 50% with mode C. During the mean follow-up of 12 months, 2301 @entity943 episodes (AE) occurred. @entity855 was performed in 2097 AE (91%) and successful in 1920 AE (92%). Acceleration of VT occurred in 65 AE (3%) and unsuccessful @entity855 was observed in 112 AE (5%). It is concluded that @entity855 in general is highly effective in pts with sustained VT. None of the tested @entity855 modes, however, proved to be superior to the other.
