7 lines (6 with data), 253 Bytes

m018b 0 128 0 7:30:00 16/04/1990
# Start time=07:30
# First beat=07:31:56.257
# <age-range>: 65-69, <sex>: Male, <medication>: Moricizine
# <RR-low-limit(sec)>: 0.375,  <RR-high-limit(sec)>: 0.875
# Note: reel-to-reel recording, not flutter-compensated