7 lines (6 with data), 250 Bytes

f132b 0 128 0 15:00:00 30/10/1988
# Start time=15:00
# First beat=15:00:00.539
# <age-range>: 70-74, <sex>: Male, <medication>: Flecainide
# <RR-low-limit(sec)>: 0.523,  <RR-high-limit(sec)>: 1
# Note: reel-to-reel recording, not flutter-compensated