7 lines (6 with data), 258 Bytes

m239b 0 128 0 11:13:00 04/05/1990
# Start time=11:13
# First beat=11:21:21.343
# <age-range>: 60-64, <sex>: Male, <medication>: Moricizine
# <RR-low-limit(sec)>: 0.492,  <RR-high-limit(sec)>: 1.101
# Note: recording with a timing signal, flutter-compensated