7 lines (6 with data), 258 Bytes

m041b 0 128 0 10:15:00 01/07/1990
# Start time=10:15
# First beat=10:20:15.218
# <age-range>: 60-64, <sex>: Male, <medication>: Moricizine
# <RR-low-limit(sec)>: 0.656,  <RR-high-limit(sec)>: 1.132
# Note: recording with a timing signal, flutter-compensated