7 lines (6 with data), 255 Bytes

m054b 0 128 0 11:00:00 24/10/1989
# Start time=11:00
# First beat=11:08:39.007
# <age-range>: 65-69, <sex>: Male, <medication>: Moricizine
# <RR-low-limit(sec)>: 0.5,  <RR-high-limit(sec)>: 0.96
# Note: recording with a timing signal, flutter-compensated