7 lines (6 with data), 251 Bytes

e145a 0 128 0 9:54:00 28/11/1987
# Start time=09:54
# First beat=09:59:46.984
# <age-range>: 50-54, <sex>: Male, <medication>: None
# <RR-low-limit(sec)>: 0.664,  <RR-high-limit(sec)>: 1.539
# Note: recording with a timing signal, flutter-compensated