7 lines (6 with data), 250 Bytes

f202a 0 128 0 15:35:00 01/09/1988
# Start time=15:35
# First beat=15:56:08.640
# <age-range>: 55-59, <sex>: Female, <medication>: None
# <RR-low-limit(sec)>: 0.507,  <RR-high-limit(sec)>: 1.031
# Note: reel-to-reel recording, not flutter-compensated