7 lines (6 with data), 250 Bytes

e102a 0 128 0 10:35:00 17/07/1988
# Start time=10:35
# First beat=10:39:37.835
# <age-range>: 70-74, <sex>: Female, <medication>: None
# <RR-low-limit(sec)>: 0.507,  <RR-high-limit(sec)>: 0.921
# Note: reel-to-reel recording, not flutter-compensated