My son was just diagnosed with svt. He has 5 episodes in the past 4-5 months where he complains of a fast hear which has been lasting anywhere from 25-45 minuets. After his 4 episode we were given a episodic monitor to try to catch an event. We did catch an event and apparently the recorded heart rate was 260. This sounds very high!!! They recommended medicine and I am hesitant to put him on it since the episodes don’t seem to bother him too much. What are the reasons for putting a child on this medicine, and what would the potential consequence be for not putting him on it. He has been prescribed 25mg atenolo once a day. Thanks