7 lines (6 with data), 248 Bytes

e246a 0 128 0 10:10:00 19/01/1988
# Start time=10:10
# First beat=10:24:58.312
# <age-range>: 60-64, <sex>: Male, <medication>: None
# <RR-low-limit(sec)>: 0.476,  <RR-high-limit(sec)>: 0.687
# Note: reel-to-reel recording, not flutter-compensated