7 lines (6 with data), 246 Bytes

m029a 0 128 0 9:00:00 21/09/1989
# Start time=09:00
# First beat=09:10:20.804
# <age-range>: 65-69, <sex>: Male, <medication>: None
# <RR-low-limit(sec)>: 0.601,  <RR-high-limit(sec)>: 1.07
# Note: reel-to-reel recording, not flutter-compensated