7 lines (6 with data), 250 Bytes

e162a 0 128 0 14:00:00 27/07/1988
# Start time=14:00
# First beat=14:12:36.367
# <age-range>: 45-49, <sex>: Female, <medication>: None
# <RR-low-limit(sec)>: 0.453,  <RR-high-limit(sec)>: 0.781
# Note: reel-to-reel recording, not flutter-compensated