7 lines (6 with data), 255 Bytes

m103b 0 128 0 11:20:00 30/01/1991
# Start time=11:20
# First beat=11:46:25.039
# <age-range>: 60-64, <sex>: Female, <medication>: Moricizine
# <RR-low-limit(sec)>: 0.492,  <RR-high-limit(sec)>: 0.89
# Note: reel-to-reel recording, not flutter-compensated