7 lines (6 with data), 247 Bytes

e284a 0 128 0 9:00:00 17/10/1988
# Start time=09:00
# First beat=09:08:49.445
# <age-range>: 55-59, <sex>: Male, <medication>: None
# <RR-low-limit(sec)>: 0.523,  <RR-high-limit(sec)>: 0.992
# Note: reel-to-reel recording, not flutter-compensated