7 lines (6 with data), 247 Bytes

m007a 0 128 0 9:30:00 11/04/1991
# Start time=09:30
# First beat=09:38:20.929
# <age-range>: 65-69, <sex>: Male, <medication>: None
# <RR-low-limit(sec)>: 0.617,  <RR-high-limit(sec)>: 1.062
# Note: reel-to-reel recording, not flutter-compensated