7 lines (6 with data), 253 Bytes

m006b 0 128 0 8:00:00 10/04/1991
# Start time=08:00
# First beat=08:13:22.070
# <age-range>: 70-74, <sex>: Male, <medication>: Moricizine
# <RR-low-limit(sec)>: 0.578,  <RR-high-limit(sec)>: 1.007
# Note: reel-to-reel recording, not flutter-compensated