7 lines (6 with data), 254 Bytes

e273a 0 128 0 14:53:00 21/03/1989
# Start time=14:53
# First beat=14:57:11.320
# <age-range>: 60-64, <sex>: Female, <medication>: None
# <RR-low-limit(sec)>: 0.742,  <RR-high-limit(sec)>: 1.382
# Note: recording with a timing signal, flutter-compensated