7 lines (6 with data), 258 Bytes

m090b 0 128 0 15:56:00 02/04/1990
# Start time=15:56
# First beat=16:04:10.007
# <age-range>: 55-59, <sex>: Male, <medication>: Moricizine
# <RR-low-limit(sec)>: 0.562,  <RR-high-limit(sec)>: 1.093
# Note: recording with a timing signal, flutter-compensated