7 lines (6 with data), 251 Bytes

f180a 0 128 0 9:18:00 25/08/1988
# Start time=09:18
# First beat=09:21:33.359
# <age-range>: 45-49, <sex>: Male, <medication>: None
# <RR-low-limit(sec)>: 0.468,  <RR-high-limit(sec)>: 1.398
# Note: recording with a timing signal, flutter-compensated