7 lines (6 with data), 255 Bytes

m129b 0 128 0 8:00:00 28/09/1992
# Start time=08:00
# First beat=08:00:00.164
# <age-range>: 50-54, <sex>: Male, <medication>: Moricizine
# <RR-low-limit(sec)>: 0.5,  <RR-high-limit(sec)>: 1.203
# Note: recording with a timing signal, flutter-compensated