7 lines (6 with data), 252 Bytes

e275a 0 128 0 21:10:00 28/05/1988
# Start time=21:10
# First beat=21:10:00.257
# <age-range>: 75-79, <sex>: Male, <medication>: None
# <RR-low-limit(sec)>: 0.554,  <RR-high-limit(sec)>: 0.898
# Note: recording with a timing signal, flutter-compensated