7 lines (6 with data), 252 Bytes

m186a 0 128 0 13:57:00 20/06/1990
# Start time=13:57
# First beat=14:00:30.609
# <age-range>: 65-69, <sex>: Female, <medication>: None
# <RR-low-limit(sec)>: 0.5,  <RR-high-limit(sec)>: 0.851
# Note: recording with a timing signal, flutter-compensated