7 lines (6 with data), 253 Bytes

m208b 0 128 0 12:25:00 14/10/1989
# Start time=12:25
# First beat=12:47:50.343
# <age-range>: 50-54, <sex>: Male, <medication>: Moricizine
# <RR-low-limit(sec)>: 0.46,  <RR-high-limit(sec)>: 0.742
# Note: reel-to-reel recording, not flutter-compensated