7 lines (6 with data), 255 Bytes

e125b 0 128 0 10:31:00 12/09/1987
# Start time=10:31
# First beat=10:32:22.421
# <age-range>: 60-64, <sex>: Female, <medication>: Encainide
# <RR-low-limit(sec)>: 0.617,  <RR-high-limit(sec)>: 1.304
# Note: reel-to-reel recording, not flutter-compensated