7 lines (6 with data), 260 Bytes

m067b 0 128 0 11:45:00 14/08/1990
# Start time=11:45
# First beat=11:49:45.835
# <age-range>: 40-44, <sex>: Female, <medication>: Moricizine
# <RR-low-limit(sec)>: 0.484,  <RR-high-limit(sec)>: 0.812
# Note: recording with a timing signal, flutter-compensated