7 lines (6 with data), 253 Bytes

m132b 0 128 0 10:35:00 23/10/1989
# Start time=10:35
# First beat=10:47:53.679
# <age-range>: 55-59, <sex>: Male, <medication>: Moricizine
# <RR-low-limit(sec)>: 0.414,  <RR-high-limit(sec)>: 0.96
# Note: reel-to-reel recording, not flutter-compensated