7 lines (6 with data), 247 Bytes

e247a 0 128 0 10:30:00 06/09/1987
# Start time=10:30
# First beat=10:30:01.359
# <age-range>: 45-49, <sex>: Male, <medication>: None
# <RR-low-limit(sec)>: 0.57,  <RR-high-limit(sec)>: 1.421
# Note: reel-to-reel recording, not flutter-compensated