7 lines (6 with data), 250 Bytes

f124a 0 128 0 12:00:00 11/11/1987
# Start time=12:00
# First beat=12:11:48.640
# <age-range>: 75-79, <sex>: Female, <medication>: None
# <RR-low-limit(sec)>: 0.632,  <RR-high-limit(sec)>: 1.109
# Note: reel-to-reel recording, not flutter-compensated