Once onset is declared for initial detection it will be reset on a redetection in the same episode. True/False?

Once onset is declared for initial detection it will be reset on a redetection in the same episode. True/False?

• A. True
• B. False
• C. Not specified
• D. It depends

Answer: (B)

Onset timing in detection episodes is anchored to the moment the arrhythmia first meets the detection criteria. After onset is declared, the duration used to decide whether therapy should fire is counted from that initial time. If the rhythm redevelops within the same episode after a brief interruption, the timer does not reset to zero. The episode’s duration continues from the original onset, so therapy decisions are based on the total time since the true start, not a fresh start on redetection. A new onset would only be declared if a separate, distinct episode begins after the rhythm has clearly returned to normal.

Onset timing in detection episodes is anchored to the moment the arrhythmia first meets the detection criteria. After onset is declared, the duration used to decide whether therapy should fire is counted from that initial time. If the rhythm redevelops within the same episode after a brief interruption, the timer does not reset to zero. The episode’s duration continues from the original onset, so therapy decisions are based on the total time since the true start, not a fresh start on redetection. A new onset would only be declared if a separate, distinct episode begins after the rhythm has clearly returned to normal.