9 lines (8 with data), 414 Bytes

m026b 0 125.44 0 8:15:00 12/07/1989
# Start time=08:15
# First beat=08:16:21.421
# <age-range>: 45-49, <sex>: Male, <medication>: Moricizine
# <RR-low-limit(sec)>: 0.601,  <RR-high-limit(sec)>: 1.218
# 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)