7 lines (6 with data), 260 Bytes

m160b 0 128 0 11:55:00 31/12/1989
# Start time=11:55
# First beat=11:55:00.304
# <age-range>: 60-64, <sex>: Female, <medication>: Moricizine
# <RR-low-limit(sec)>: 0.476,  <RR-high-limit(sec)>: 0.781
# Note: recording with a timing signal, flutter-compensated