7 lines (6 with data), 254 Bytes

f153b 0 128 0 12:00:00 16/02/1988
# Start time=12:00
# First beat=12:26:21.835
# <age-range>: 45-49, <sex>: Male, <medication>: Flecainide
# <RR-low-limit(sec)>: 0.523,  <RR-high-limit(sec)>: 1.078
# Note: reel-to-reel recording, not flutter-compensated