the shortest atrial pacing cycle length maintaining 1:1 conduction over the accessory pathway at control study w3as 328 +/- 66 msec in patients in whom antegrade conduction block occurred , and it was 247 +/- 21 msec ( p less than .01 ) in patients in whom conduction remained during encainide therapy .
C0018794
conduction block
C0085251
encainide