7 lines (6 with data), 252 Bytes

e239a 0 128 0 10:12:00 03/11/1987
# Start time=10:12
# First beat=10:16:30.554
# <age-range>: 50-54, <sex>: Male, <medication>: None
# <RR-low-limit(sec)>: 0.507,  <RR-high-limit(sec)>: 1.023
# Note: recording with a timing signal, flutter-compensated