7 lines (6 with data), 258 Bytes

m205b 0 128 0 12:00:00 30/04/1990
# Start time=12:00
# First beat=12:07:33.000
# <age-range>: 60-64, <sex>: Male, <medication>: Moricizine
# <RR-low-limit(sec)>: 0.578,  <RR-high-limit(sec)>: 1.117
# Note: recording with a timing signal, flutter-compensated