7 lines (6 with data), 254 Bytes

m113b 0 128 0 14:30:00 27/02/1991
# Start time=14:30
# First beat=14:30:15.453
# <age-range>: 45-49, <sex>: Male, <medication>: Moricizine
# <RR-low-limit(sec)>: 0.476,  <RR-high-limit(sec)>: 0.765
# Note: reel-to-reel recording, not flutter-compensated