7 lines (6 with data), 248 Bytes

m104b 0 128 0 14:00:00 15/10/1987
# Start time=14:00
# First beat=14:13:32.773
# <age-range>: 50-54, <sex>: Male, <medication>: Moricizine
# <RR-low-limit(sec)>: NA,  <RR-high-limit(sec)>: NA
# Note: reel-to-reel recording, not flutter-compensated