7 lines (6 with data), 260 Bytes

m211b 0 128 0 18:15:00 17/06/1990
# Start time=18:15
# First beat=18:22:30.343
# <age-range>: 65-69, <sex>: Female, <medication>: Moricizine
# <RR-low-limit(sec)>: 0.359,  <RR-high-limit(sec)>: 1.179
# Note: recording with a timing signal, flutter-compensated