Final answer:
AVNRT patients typically present with palpitations during adulthood.
Step-by-step explanation:
AVNRT stands for Atrioventricular Nodal Reentrant Tachycardia, which is a type of abnormal heart rhythm. This condition typically affects patients between the ages of 20 and 40. Palpitations, which are feelings of a rapid or irregular heartbeat, are a common symptom of AVNRT. Therefore, AVNRT patients typically present with palpitations during adulthood.