7 lines (6 with data), 254 Bytes

f125b 0 128 0 14:45:00 15/07/1987
# Start time=14:45
# First beat=15:05:13.937
# <age-range>: 50-54, <sex>: Male, <medication>: Flecainide
# <RR-low-limit(sec)>: 0.515,  <RR-high-limit(sec)>: 1.179
# Note: reel-to-reel recording, not flutter-compensated