9 lines (8 with data), 415 Bytes

m035b 0 125.44 0 12:59:00 27/07/1988
# Start time=12:59
# First beat=12:59:03.500
# <age-range>: 75-79, <sex>: Male, <medication>: Moricizine
# <RR-low-limit(sec)>: 0.671,  <RR-high-limit(sec)>: 1.054
# 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)