7 lines (6 with data), 258 Bytes

m045b 0 128 0 13:30:00 22/05/1990
# Start time=13:30
# First beat=13:31:11.851
# <age-range>: 50-54, <sex>: Male, <medication>: Moricizine
# <RR-low-limit(sec)>: 0.421,  <RR-high-limit(sec)>: 1.015
# Note: recording with a timing signal, flutter-compensated