7 lines (6 with data), 260 Bytes

f128b 0 128 0 12:00:00 20/02/1989
# Start time=12:00
# First beat=12:06:53.835
# <age-range>: 65-69, <sex>: Female, <medication>: Flecainide
# <RR-low-limit(sec)>: 0.578,  <RR-high-limit(sec)>: 1.125
# Note: recording with a timing signal, flutter-compensated