7 lines (6 with data), 254 Bytes

m213b 0 128 0 12:00:00 13/01/1990
# Start time=12:00
# First beat=12:23:02.085
# <age-range>: 70-74, <sex>: Male, <medication>: Moricizine
# <RR-low-limit(sec)>: 0.601,  <RR-high-limit(sec)>: 1.078
# Note: reel-to-reel recording, not flutter-compensated