7 lines (6 with data), 249 Bytes

e214a 0 128 0 12:15:00 12/03/1988
# Start time=12:15
# First beat=12:16:48.429
# <age-range>: 65-69, <sex>: Female, <medication>: None
# <RR-low-limit(sec)>: 0.57,  <RR-high-limit(sec)>: 1.062
# Note: reel-to-reel recording, not flutter-compensated