7 lines (6 with data), 250 Bytes

e039a 0 128 0 12:30:00 15/05/1988
# Start time=12:30
# First beat=12:52:26.289
# <age-range>: 55-59, <sex>: Female, <medication>: None
# <RR-low-limit(sec)>: 0.562,  <RR-high-limit(sec)>: 1.203
# Note: reel-to-reel recording, not flutter-compensated