7 lines (6 with data), 247 Bytes

m240a 0 128 0 10:02:00 15/08/1990
# Start time=10:02
# First beat=10:02:00.085
# <age-range>: 50-54, <sex>: Male, <medication>: None
# <RR-low-limit(sec)>: 0.64,  <RR-high-limit(sec)>: 1.281
# Note: reel-to-reel recording, not flutter-compensated