7 lines (6 with data), 258 Bytes

m262b 0 128 0 10:15:00 06/06/1988
# Start time=10:15
# First beat=10:22:15.773
# <age-range>: 55-59, <sex>: Male, <medication>: Moricizine
# <RR-low-limit(sec)>: 0.656,  <RR-high-limit(sec)>: 1.218
# Note: recording with a timing signal, flutter-compensated