7 lines (6 with data), 250 Bytes

f072a 0 128 0 10:10:00 24/09/1988
# Start time=10:10
# First beat=10:13:04.187
# <age-range>: 65-69, <sex>: Male, <medication>: None
# <RR-low-limit(sec)>: 0.46,  <RR-high-limit(sec)>: 1.21
# Note: recording with a timing signal, flutter-compensated