7 lines (6 with data), 251 Bytes

e277a 0 128 0 9:50:00 11/02/1988
# Start time=09:50
# First beat=09:54:34.031
# <age-range>: 50-54, <sex>: Male, <medication>: None
# <RR-low-limit(sec)>: 0.515,  <RR-high-limit(sec)>: 1.046
# Note: recording with a timing signal, flutter-compensated