7 lines (6 with data), 250 Bytes

e060a 0 128 0 11:30:00 07/10/1988
# Start time=11:30
# First beat=11:45:15.585
# <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