7 lines (6 with data), 246 Bytes

m127a 0 128 0 15:50:00 16/03/1989
# Start time=15:50
# First beat=16:09:23.828
# <age-range>: 55-59, <sex>: Male, <medication>: None
# <RR-low-limit(sec)>: 0.5,  <RR-high-limit(sec)>: 0.906
# Note: reel-to-reel recording, not flutter-compensated