7 lines (6 with data), 247 Bytes

f142a 0 128 0 16:50:00 25/08/1987
# Start time=16:50
# First beat=17:32:56.710
# <age-range>: 50-54, <sex>: Male, <medication>: None
# <RR-low-limit(sec)>: 0.46,  <RR-high-limit(sec)>: 1.351
# Note: reel-to-reel recording, not flutter-compensated