7 lines (6 with data), 257 Bytes

m009b 0 128 0 9:15:00 15/12/1990
# Start time=09:15
# First beat=09:24:20.281
# <age-range>: 50-54, <sex>: Male, <medication>: Moricizine
# <RR-low-limit(sec)>: 0.687,  <RR-high-limit(sec)>: 1.296
# Note: recording with a timing signal, flutter-compensated