7 lines (6 with data), 258 Bytes

m001b 0 128 0 16:00:00 18/10/1990
# Start time=16:00
# First beat=16:08:09.578
# <age-range>: 60-64, <sex>: Male, <medication>: Moricizine
# <RR-low-limit(sec)>: 0.585,  <RR-high-limit(sec)>: 1.398
# Note: recording with a timing signal, flutter-compensated