7 lines (6 with data), 254 Bytes

m115b 0 128 0 10:55:00 13/05/1989
# Start time=10:55
# First beat=11:58:03.203
# <age-range>: 70-74, <sex>: Female, <medication>: Moricizine
# <RR-low-limit(sec)>: 0.648,  <RR-high-limit(sec)>: 1.5
# Note: reel-to-reel recording, not flutter-compensated