7 lines (6 with data), 248 Bytes

f184a 0 128 0 11:50:00 12/11/1987
# Start time=11:50
# First beat=12:35:53.453
# <age-range>: 50-54, <sex>: Male, <medication>: None
# <RR-low-limit(sec)>: 0.507,  <RR-high-limit(sec)>: 1.031
# Note: reel-to-reel recording, not flutter-compensated