7 lines (6 with data), 254 Bytes

m077b 0 128 0 11:10:00 27/08/1989
# Start time=11:10
# First beat=11:12:03.046
# <age-range>: 60-64, <sex>: Male, <medication>: Moricizine
# <RR-low-limit(sec)>: 0.468,  <RR-high-limit(sec)>: 1.187
# Note: reel-to-reel recording, not flutter-compensated