7 lines (6 with data), 246 Bytes

m008a 0 128 0 11:14:00 02/11/1990
# Start time=11:14
# First beat=11:14:28.664
# <age-range>: 60-64, <sex>: Male, <medication>: None
# <RR-low-limit(sec)>: 0.765,  <RR-high-limit(sec)>: 1.5
# Note: reel-to-reel recording, not flutter-compensated