7 lines (6 with data), 248 Bytes

m039a 0 128 0 13:20:00 31/07/1990
# Start time=13:20
# First beat=13:20:00.125
# <age-range>: 50-54, <sex>: Male, <medication>: None
# <RR-low-limit(sec)>: 0.687,  <RR-high-limit(sec)>: 1.164
# Note: reel-to-reel recording, not flutter-compensated