7 lines (6 with data), 258 Bytes

m028b 0 128 0 13:14:00 02/04/1991
# Start time=13:14
# First beat=13:17:28.484
# <age-range>: 50-54, <sex>: Male, <medication>: Moricizine
# <RR-low-limit(sec)>: 0.445,  <RR-high-limit(sec)>: 0.773
# Note: recording with a timing signal, flutter-compensated