7 lines (6 with data), 254 Bytes

m292b 0 128 0 14:10:00 26/07/1988
# Start time=14:10
# First beat=16:13:33.476
# <age-range>: 65-69, <sex>: Male, <medication>: Moricizine
# <RR-low-limit(sec)>: 0.601,  <RR-high-limit(sec)>: 0.953
# Note: reel-to-reel recording, not flutter-compensated