7 lines (6 with data), 257 Bytes

m012b 0 128 0 9:40:00 30/08/1987
# Start time=09:40
# First beat=09:42:20.500
# <age-range>: 50-54, <sex>: Male, <medication>: Moricizine
# <RR-low-limit(sec)>: 0.437,  <RR-high-limit(sec)>: 1.007
# Note: recording with a timing signal, flutter-compensated