7 lines (6 with data), 258 Bytes

m180b 0 128 0 13:45:00 24/05/1990
# Start time=13:45
# First beat=13:53:20.968
# <age-range>: 70-74, <sex>: Male, <medication>: Moricizine
# <RR-low-limit(sec)>: 0.617,  <RR-high-limit(sec)>: 1.031
# Note: recording with a timing signal, flutter-compensated