7 lines (6 with data), 252 Bytes

m118a 0 128 0 10:04:00 29/04/1990
# Start time=10:04
# First beat=10:07:05.898
# <age-range>: 60-64, <sex>: Male, <medication>: None
# <RR-low-limit(sec)>: 0.429,  <RR-high-limit(sec)>: 0.929
# Note: recording with a timing signal, flutter-compensated