7 lines (6 with data), 259 Bytes

m074b 0 128 0 13:45:00 11/02/1991
# Start time=13:45
# First beat=13:53:08.898
# <age-range>: 70-74, <sex>: Female, <medication>: Moricizine
# <RR-low-limit(sec)>: 0.57,  <RR-high-limit(sec)>: 1.046
# Note: recording with a timing signal, flutter-compensated