7 lines (6 with data), 248 Bytes

m065a 0 128 0 10:08:00 24/03/1990
# Start time=10:08
# First beat=10:10:33.507
# <age-range>: 60-64, <sex>: Male, <medication>: None
# <RR-low-limit(sec)>: 0.406,  <RR-high-limit(sec)>: 0.953
# Note: reel-to-reel recording, not flutter-compensated