7 lines (6 with data), 252 Bytes

e255a 0 128 0 12:30:00 16/03/1989
# Start time=12:30
# First beat=12:44:42.523
# <age-range>: 45-49, <sex>: Male, <medication>: None
# <RR-low-limit(sec)>: 0.507,  <RR-high-limit(sec)>: 1.507
# Note: recording with a timing signal, flutter-compensated