7 lines (6 with data), 252 Bytes

m182a 0 128 0 13:27:00 10/05/1991
# Start time=13:27
# First beat=13:33:00.757
# <age-range>: 50-54, <sex>: Male, <medication>: None
# <RR-low-limit(sec)>: 0.609,  <RR-high-limit(sec)>: 1.351
# Note: recording with a timing signal, flutter-compensated