7 lines (6 with data), 247 Bytes

f123a 0 128 0 15:00:00 15/03/1988
# Start time=15:00
# First beat=15:12:19.789
# <age-range>: 65-69, <sex>: Male, <medication>: None
# <RR-low-limit(sec)>: 0.57,  <RR-high-limit(sec)>: 1.125
# Note: reel-to-reel recording, not flutter-compensated