7 lines (6 with data), 250 Bytes

e107a 0 128 0 10:08:00 08/06/1987
# Start time=10:08
# First beat=10:20:27.109
# <age-range>: 60-64, <sex>: Female, <medication>: None
# <RR-low-limit(sec)>: 0.648,  <RR-high-limit(sec)>: 0.968
# Note: reel-to-reel recording, not flutter-compensated