7 lines (6 with data), 253 Bytes

m245b 0 128 0 9:30:00 24/11/1989
# Start time=09:30
# First beat=09:30:00.007
# <age-range>: 65-69, <sex>: Male, <medication>: Moricizine
# <RR-low-limit(sec)>: 0.453,  <RR-high-limit(sec)>: 0.804
# Note: reel-to-reel recording, not flutter-compensated