7 lines (6 with data), 254 Bytes

m235b 0 128 0 10:56:00 06/08/1989
# Start time=10:56
# First beat=10:56:01.039
# <age-range>: 60-64, <sex>: Male, <medication>: Moricizine
# <RR-low-limit(sec)>: 0.382,  <RR-high-limit(sec)>: 1.468
# Note: reel-to-reel recording, not flutter-compensated