9 lines (8 with data), 409 Bytes

m010a 0 125.44 0 15:10:00 31/03/1989
# Start time=15:10
# First beat=15:10:54.406
# <age-range>: 60-64, <sex>: Male, <medication>: None
# <RR-low-limit(sec)>: 0.695,  <RR-high-limit(sec)>: 2.015
# 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)