7 lines (6 with data), 260 Bytes

m059b 0 128 0 11:48:00 10/06/1991
# Start time=11:48
# First beat=11:56:39.234
# <age-range>: 55-59, <sex>: Female, <medication>: Moricizine
# <RR-low-limit(sec)>: 0.437,  <RR-high-limit(sec)>: 0.968
# Note: recording with a timing signal, flutter-compensated