7 lines (6 with data), 257 Bytes

m120b 0 128 0 8:50:00 08/07/1990
# Start time=08:50
# First beat=08:57:47.664
# <age-range>: 40-44, <sex>: Male, <medication>: Moricizine
# <RR-low-limit(sec)>: 0.492,  <RR-high-limit(sec)>: 0.757
# Note: recording with a timing signal, flutter-compensated