7 lines (6 with data), 252 Bytes

e238a 0 128 0 15:00:00 25/05/1988
# Start time=15:00
# First beat=15:08:20.304
# <age-range>: 45-49, <sex>: Male, <medication>: None
# <RR-low-limit(sec)>: 0.515,  <RR-high-limit(sec)>: 1.351
# Note: recording with a timing signal, flutter-compensated