7 lines (6 with data), 252 Bytes

f048a 0 128 0 15:45:00 17/07/1988
# Start time=15:45
# First beat=15:45:48.804
# <age-range>: 60-64, <sex>: Male, <medication>: None
# <RR-low-limit(sec)>: 0.539,  <RR-high-limit(sec)>: 1.265
# Note: recording with a timing signal, flutter-compensated