7 lines (6 with data), 250 Bytes

e224b 0 128 0 9:30:00 25/11/1988
# Start time=09:30
# First beat=09:30:00.593
# <age-range>: 55-59, <sex>: Male, <medication>: Encainide
# <RR-low-limit(sec)>: NA,  <RR-high-limit(sec)>: NA
# Note: recording with a timing signal, flutter-compensated