7 lines (6 with data), 253 Bytes

m007b 0 128 0 8:45:00 22/05/1991
# Start time=08:45
# First beat=08:53:34.046
# <age-range>: 65-69, <sex>: Male, <medication>: Moricizine
# <RR-low-limit(sec)>: 0.554,  <RR-high-limit(sec)>: 1.156
# Note: reel-to-reel recording, not flutter-compensated