9 lines (8 with data), 415 Bytes

f023b 0 125.44 0 10:11:00 09/08/1988
# Start time=10:11
# First beat=10:12:00.937
# <age-range>: 60-64, <sex>: Male, <medication>: Flecainide
# <RR-low-limit(sec)>: 0.507,  <RR-high-limit(sec)>: 1.101
# 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)