Which statement about IEGM storage capabilities is correct for older vs current ICDs?

Which statement about IEGM storage capabilities is correct for older vs current ICDs?

• A. Current: 60 minutes, 5 categories; Older: 24 minutes 3-channel and 32 minutes 2-channel
• B. Current: 30 minutes; Older: 60 minutes
• C. Current: 120 minutes; Older: 24 minutes 3-channel and 32 minutes 2-channel
• D. Current: 90 minutes; Older: 12 minutes

Answer: (A)

IEGM storage capacity has increased as ICD memory and data organization have improved. Modern devices can store about 60 minutes of IEGM data and use more flexible storage organization (five categories), enabling longer recording windows and better categorization of events. Older ICDs had shorter storage windows—roughly 24 minutes for 3-channel recording and 32 minutes for 2-channel recording—with fewer channels to review. This combination of longer duration and richer organization in current devices makes the statement describing 60 minutes and five categories the best fit for modern ICDs.

IEGM storage capacity has increased as ICD memory and data organization have improved. Modern devices can store about 60 minutes of IEGM data and use more flexible storage organization (five categories), enabling longer recording windows and better categorization of events. Older ICDs had shorter storage windows—roughly 24 minutes for 3-channel recording and 32 minutes for 2-channel recording—with fewer channels to review. This combination of longer duration and richer organization in current devices makes the statement describing 60 minutes and five categories the best fit for modern ICDs.