9 lines (8 with data), 408 Bytes

f170a 0 125.44 0 7:31:00 28/09/1987
# Start time=07:31
# First beat=07:32:39.062
# <age-range>: 70-74, <sex>: Male, <medication>: None
# <RR-low-limit(sec)>: 0.523,  <RR-high-limit(sec)>: 1.726
# Note: reel-to-reel recording, not flutter-compensated;
#       time rescaled to fit the recording speed (1.47mm/s) from the scanning
#       speed (1.50mm/s) (i.e., sampling-rate adjusted to 125.44Hz from 128Hz)