7 lines (6 with data), 251 Bytes

f100a 0 128 0 9:00:00 23/11/1988
# Start time=09:00
# First beat=09:00:00.023
# <age-range>: 55-59, <sex>: Male, <medication>: None
# <RR-low-limit(sec)>: 0.757,  <RR-high-limit(sec)>: 1.312
# Note: recording with a timing signal, flutter-compensated