7 lines (6 with data), 252 Bytes

m060a 0 128 0 12:57:00 17/10/1990
# Start time=12:57
# First beat=13:07:45.304
# <age-range>: 40-44, <sex>: Male, <medication>: None
# <RR-low-limit(sec)>: 0.406,  <RR-high-limit(sec)>: 1.093
# Note: recording with a timing signal, flutter-compensated