7 lines (6 with data), 247 Bytes

m073a 0 128 0 9:19:00 20/08/1989
# Start time=09:19
# First beat=09:31:19.523
# <age-range>: 55-59, <sex>: Male, <medication>: None
# <RR-low-limit(sec)>: 0.484,  <RR-high-limit(sec)>: 0.984
# Note: reel-to-reel recording, not flutter-compensated