7 lines (6 with data), 259 Bytes

e266b 0 128 0 14:45:00 14/02/1989
# Start time=14:45
# First beat=14:47:01.468
# <age-range>: 60-64, <sex>: Female, <medication>: Encainide
# <RR-low-limit(sec)>: 0.468,  <RR-high-limit(sec)>: 0.828
# Note: recording with a timing signal, flutter-compensated