7 lines (6 with data), 254 Bytes

m199a 0 128 0 15:11:00 12/11/1990
# Start time=15:11
# First beat=15:18:54.976
# <age-range>: 50-54, <sex>: Female, <medication>: None
# <RR-low-limit(sec)>: 0.414,  <RR-high-limit(sec)>: 0.851
# Note: recording with a timing signal, flutter-compensated