7 lines (6 with data), 248 Bytes

m098a 0 128 0 11:08:00 30/08/1988
# Start time=11:08
# First beat=11:23:36.835
# <age-range>: 70-74, <sex>: Male, <medication>: None
# <RR-low-limit(sec)>: 0.562,  <RR-high-limit(sec)>: 1.171
# Note: reel-to-reel recording, not flutter-compensated