7 lines (6 with data), 252 Bytes

f166a 0 128 0 12:10:00 24/12/1988
# Start time=12:10
# First beat=12:17:33.984
# <age-range>: 55-59, <sex>: Male, <medication>: None
# <RR-low-limit(sec)>: 0.625,  <RR-high-limit(sec)>: 1.171
# Note: recording with a timing signal, flutter-compensated