7 lines (6 with data), 250 Bytes

f092a 0 128 0 11:36:00 04/02/1988
# Start time=11:36
# First beat=11:42:44.875
# <age-range>: 45-49, <sex>: Female, <medication>: None
# <RR-low-limit(sec)>: 0.476,  <RR-high-limit(sec)>: 1.218
# Note: reel-to-reel recording, not flutter-compensated