9 lines (8 with data), 409 Bytes

m026a 0 125.44 0 11:03:00 09/06/1989
# Start time=11:03
# First beat=11:05:01.398
# <age-range>: 45-49, <sex>: Male, <medication>: None
# <RR-low-limit(sec)>: 0.601,  <RR-high-limit(sec)>: 1.367
# 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)