7 lines (6 with data), 254 Bytes

m249b 0 128 0 13:20:00 22/06/1991
# Start time=13:20
# First beat=13:28:18.585
# <age-range>: 75-79, <sex>: Male, <medication>: Moricizine
# <RR-low-limit(sec)>: 0.585,  <RR-high-limit(sec)>: 1.164
# Note: reel-to-reel recording, not flutter-compensated