7 lines (6 with data), 254 Bytes

m191b 0 128 0 22:45:00 14/03/1991
# Start time=22:45
# First beat=22:45:00.296
# <age-range>: 45-49, <sex>: Male, <medication>: Moricizine
# <RR-low-limit(sec)>: 0.468,  <RR-high-limit(sec)>: 0.851
# Note: reel-to-reel recording, not flutter-compensated