7 lines (6 with data), 254 Bytes

m039b 0 128 0 10:15:00 01/12/1990
# Start time=10:15
# First beat=10:32:01.445
# <age-range>: 50-54, <sex>: Male, <medication>: Moricizine
# <RR-low-limit(sec)>: 0.421,  <RR-high-limit(sec)>: 0.757
# Note: reel-to-reel recording, not flutter-compensated