7 lines (6 with data), 254 Bytes

m027a 0 128 0 11:00:00 25/01/1991
# Start time=11:00
# First beat=11:05:00.601
# <age-range>: 65-69, <sex>: Female, <medication>: None
# <RR-low-limit(sec)>: 0.531,  <RR-high-limit(sec)>: 1.031
# Note: recording with a timing signal, flutter-compensated