7 lines (6 with data), 258 Bytes

m233b 0 128 0 13:38:00 05/10/1990
# Start time=13:38
# First beat=13:46:21.531
# <age-range>: 40-44, <sex>: Male, <medication>: Moricizine
# <RR-low-limit(sec)>: 0.515,  <RR-high-limit(sec)>: 1.039
# Note: recording with a timing signal, flutter-compensated