Slow pathway modification for atrioventricular node re-entrant tachycardia: fast junctional tachycardia predicts adverse prognosis

136 consecutive patients with typical "slow-fast" atrioventricular (AV) node re-entrant tachycardia undergoing 137 slow pathway modification procedures.

Slow pathway modification using temperature feedback controlled radiofrequency energy application.

Development of junctional tachycardia, its duration and maximum, minimum, and mean cycle length, occurrence of heart block, persistent slow pathway conduction, or later confirmed recurrence of AV node re-entrant tachycardia.safety