7 lines (6 with data), 248 Bytes

m036a 0 128 0 15:12:00 08/02/1991
# Start time=15:12
# First beat=15:19:12.140
# <age-range>: 70-74, <sex>: Male, <medication>: None
# <RR-low-limit(sec)>: 0.507,  <RR-high-limit(sec)>: 0.828
# Note: reel-to-reel recording, not flutter-compensated