7 lines (6 with data), 258 Bytes

m042b 0 128 0 11:00:00 09/05/1991
# Start time=11:00
# First beat=11:04:29.500
# <age-range>: 65-69, <sex>: Male, <medication>: Moricizine
# <RR-low-limit(sec)>: 0.625,  <RR-high-limit(sec)>: 1.132
# Note: recording with a timing signal, flutter-compensated