7 lines (6 with data), 254 Bytes

m272b 0 128 0 14:56:00 03/10/1990
# Start time=14:56
# First beat=15:23:10.351
# <age-range>: 60-64, <sex>: Male, <medication>: Moricizine
# <RR-low-limit(sec)>: 0.492,  <RR-high-limit(sec)>: 1.293
# Note: reel-to-reel recording, not flutter-compensated