7 lines (6 with data), 247 Bytes

f138a 0 128 0 7:20:00 13/04/1988
# Start time=07:20
# First beat=07:42:17.640
# <age-range>: 45-49, <sex>: Male, <medication>: None
# <RR-low-limit(sec)>: 0.484,  <RR-high-limit(sec)>: 0.695
# Note: reel-to-reel recording, not flutter-compensated