7 lines (6 with data), 248 Bytes

f181a 0 128 0 10:05:00 18/05/1988
# Start time=10:05
# First beat=10:24:03.898
# <age-range>: 70-74, <sex>: Male, <medication>: None
# <RR-low-limit(sec)>: 0.484,  <RR-high-limit(sec)>: 0.953
# Note: reel-to-reel recording, not flutter-compensated