Final answer:
The statement regarding the better success rates of slow pathway abolition over slow pathway modification for AVNRT recurrence is true, as full abolition of the slow conduction pathway in the AV node region is typically more effective in preventing the arrhythmia from recurring.
Step-by-step explanation:
The statement that slow pathway abolition has demonstrated better success rates for AV nodal reentrant tachycardia (AVNRT) recurrence when compared with slow pathway modification is True. The slow pathway abolition involves the targeted ablation of the slow conduction pathway within the atrioventricular (AV) node region. This is done to eliminate the substrate for the reentrant circuit responsible for AVNRT, leading to a lower recurrence rate of arrhythmia. On the other hand, slow pathway modification, which attempts to modify conduction properties without completely abolishing the pathway, is less effective in preventing AVNRT recurrences.