7 lines (6 with data), 257 Bytes

m122b 0 128 0 12:10:00 22/06/1991
# Start time=12:10
# First beat=12:17:46.359
# <age-range>: 65-69, <sex>: Male, <medication>: Moricizine
# <RR-low-limit(sec)>: 0.492,  <RR-high-limit(sec)>: 0.71
# Note: recording with a timing signal, flutter-compensated