7 lines (6 with data), 252 Bytes

m001a 0 128 0 10:15:00 21/09/1990
# Start time=10:15
# First beat=10:17:54.812
# <age-range>: 60-64, <sex>: Male, <medication>: None
# <RR-low-limit(sec)>: 0.562,  <RR-high-limit(sec)>: 1.226
# Note: recording with a timing signal, flutter-compensated