7 lines (6 with data), 246 Bytes

e138a 0 128 0 10:30:00 24/07/1988
# Start time=10:30
# First beat=10:30:00.554
# <age-range>: 60-64, <sex>: Female, <medication>: None
# <RR-low-limit(sec)>: 0.546,  <RR-high-limit(sec)>: 1
# Note: reel-to-reel recording, not flutter-compensated