7 lines (6 with data), 252 Bytes

m228b 0 128 0 11:07:00 05/02/1991
# Start time=11:07
# First beat=11:07:32.476
# <age-range>: 60-64, <sex>: Male, <medication>: Moricizine
# <RR-low-limit(sec)>: NA,  <RR-high-limit(sec)>: NA
# Note: recording with a timing signal, flutter-compensated