7 lines (6 with data), 257 Bytes

m068b 0 128 0 11:45:00 12/03/1991
# Start time=11:45
# First beat=11:51:23.328
# <age-range>: 70-74, <sex>: Male, <medication>: Moricizine
# <RR-low-limit(sec)>: 0.46,  <RR-high-limit(sec)>: 1.265
# Note: recording with a timing signal, flutter-compensated