7 lines (6 with data), 247 Bytes

e258a 0 128 0 11:46:00 31/08/1988
# Start time=11:46
# First beat=11:47:09.554
# <age-range>: 65-69, <sex>: Male, <medication>: None
# <RR-low-limit(sec)>: 0.531,  <RR-high-limit(sec)>: 1.39
# Note: reel-to-reel recording, not flutter-compensated