7 lines (6 with data), 244 Bytes

m256a 0 128 0 22:00:00 14/02/1991
# Start time=22:00
# First beat=22:04:44.054
# <age-range>: 55-59, <sex>: Male, <medication>: None
# <RR-low-limit(sec)>: 0.515,  <RR-high-limit(sec)>: 1
# Note: reel-to-reel recording, not flutter-compensated