7 lines (6 with data), 252 Bytes

m281b 0 128 0 10:00:00 14/07/1988
# Start time=10:00
# First beat=10:08:13.679
# <age-range>: 65-69, <sex>: Male, <medication>: Moricizine
# <RR-low-limit(sec)>: 0.5,  <RR-high-limit(sec)>: 1.085
# Note: reel-to-reel recording, not flutter-compensated