7 lines (6 with data), 250 Bytes

e181a 0 128 0 13:00:00 24/02/1988
# Start time=13:00
# First beat=13:19:08.312
# <age-range>: 65-69, <sex>: Female, <medication>: None
# <RR-low-limit(sec)>: 0.679,  <RR-high-limit(sec)>: 1.195
# Note: reel-to-reel recording, not flutter-compensated