7 lines (6 with data), 254 Bytes

m086b 0 128 0 11:30:00 05/02/1991
# Start time=11:30
# First beat=11:30:00.421
# <age-range>: 60-64, <sex>: Male, <medication>: Moricizine
# <RR-low-limit(sec)>: 0.492,  <RR-high-limit(sec)>: 0.781
# Note: reel-to-reel recording, not flutter-compensated