7 lines (6 with data), 250 Bytes

e009a 0 128 0 16:50:00 13/05/1988
# Start time=16:50
# First beat=17:13:34.546
# <age-range>: 70-74, <sex>: Female, <medication>: None
# <RR-low-limit(sec)>: 0.531,  <RR-high-limit(sec)>: 1.031
# Note: reel-to-reel recording, not flutter-compensated