7 lines (6 with data), 258 Bytes

m165b 0 128 0 13:40:00 13/12/1990
# Start time=13:40
# First beat=13:48:09.679
# <age-range>: 70-74, <sex>: Male, <medication>: Moricizine
# <RR-low-limit(sec)>: 0.593,  <RR-high-limit(sec)>: 1.179
# Note: recording with a timing signal, flutter-compensated