7 lines (6 with data), 252 Bytes

m005a 0 128 0 16:45:00 27/01/1990
# Start time=16:45
# First beat=16:53:41.468
# <age-range>: 60-64, <sex>: Male, <medication>: None
# <RR-low-limit(sec)>: 0.601,  <RR-high-limit(sec)>: 1.117
# Note: recording with a timing signal, flutter-compensated