7 lines (6 with data), 249 Bytes

f183a 0 128 0 11:45:00 25/08/1988
# Start time=11:45
# First beat=11:57:53.359
# <age-range>: 40-44, <sex>: Female, <medication>: None
# <RR-low-limit(sec)>: 0.476,  <RR-high-limit(sec)>: 0.75
# Note: reel-to-reel recording, not flutter-compensated