7 lines (6 with data), 247 Bytes

e250a 0 128 0 9:58:00 15/09/1988
# Start time=09:58
# First beat=09:59:12.953
# <age-range>: 45-49, <sex>: Male, <medication>: None
# <RR-low-limit(sec)>: 0.609,  <RR-high-limit(sec)>: 0.992
# Note: reel-to-reel recording, not flutter-compensated