7 lines (6 with data), 252 Bytes

e158a 0 128 0 12:30:00 23/02/1988
# Start time=12:30
# First beat=12:33:43.757
# <age-range>: 65-69, <sex>: Male, <medication>: None
# <RR-low-limit(sec)>: 0.546,  <RR-high-limit(sec)>: 1.148
# Note: recording with a timing signal, flutter-compensated