7 lines (6 with data), 258 Bytes

m046b 0 128 0 10:10:00 04/05/1991
# Start time=10:10
# First beat=10:10:00.085
# <age-range>: 40-44, <sex>: Male, <medication>: Moricizine
# <RR-low-limit(sec)>: 0.414,  <RR-high-limit(sec)>: 1.101
# Note: recording with a timing signal, flutter-compensated