7 lines (6 with data), 258 Bytes

m134b 0 128 0 14:17:00 08/02/1990
# Start time=14:17
# First beat=14:25:21.132
# <age-range>: 55-59, <sex>: Male, <medication>: Moricizine
# <RR-low-limit(sec)>: 0.671,  <RR-high-limit(sec)>: 1.187
# Note: recording with a timing signal, flutter-compensated