7 lines (6 with data), 257 Bytes

m031b 0 128 0 9:30:00 31/05/1989
# Start time=09:30
# First beat=09:38:05.234
# <age-range>: 60-64, <sex>: Male, <medication>: Moricizine
# <RR-low-limit(sec)>: 0.507,  <RR-high-limit(sec)>: 1.023
# Note: recording with a timing signal, flutter-compensated