7 lines (6 with data), 248 Bytes

m203a 0 128 0 13:46:00 21/11/1988
# Start time=13:46
# First beat=13:59:29.640
# <age-range>: 75-79, <sex>: Male, <medication>: None
# <RR-low-limit(sec)>: 0.546,  <RR-high-limit(sec)>: 1.054
# Note: reel-to-reel recording, not flutter-compensated