7 lines (6 with data), 250 Bytes

f168a 0 128 0 21:08:00 06/05/1988
# Start time=21:08
# First beat=21:12:25.250
# <age-range>: 60-64, <sex>: Female, <medication>: None
# <RR-low-limit(sec)>: 0.664,  <RR-high-limit(sec)>: 1.062
# Note: reel-to-reel recording, not flutter-compensated