7 lines (6 with data), 251 Bytes

f225a 0 128 0 8:30:00 11/04/1988
# Start time=08:30
# First beat=08:38:00.601
# <age-range>: 70-74, <sex>: Male, <medication>: None
# <RR-low-limit(sec)>: 0.539,  <RR-high-limit(sec)>: 0.984
# Note: recording with a timing signal, flutter-compensated