7 lines (6 with data), 255 Bytes

m282b 0 128 0 10:10:00 17/03/1991
# Start time=10:10
# First beat=10:30:00.421
# <age-range>: 65-69, <sex>: Female, <medication>: Moricizine
# <RR-low-limit(sec)>: 0.492,  <RR-high-limit(sec)>: 0.96
# Note: reel-to-reel recording, not flutter-compensated