7 lines (6 with data), 248 Bytes

m014a 0 128 0 17:00:00 04/04/1989
# Start time=17:00
# First beat=17:51:19.382
# <age-range>: 50-54, <sex>: Male, <medication>: None
# <RR-low-limit(sec)>: 0.546,  <RR-high-limit(sec)>: 0.945
# Note: reel-to-reel recording, not flutter-compensated