7 lines (6 with data), 258 Bytes

m161b 0 128 0 13:15:00 24/12/1989
# Start time=13:15
# First beat=13:15:00.195
# <age-range>: 55-59, <sex>: Male, <medication>: Moricizine
# <RR-low-limit(sec)>: 0.687,  <RR-high-limit(sec)>: 1.335
# Note: recording with a timing signal, flutter-compensated