7 lines (6 with data), 254 Bytes

m062b 0 128 0 11:36:00 31/05/1991
# Start time=11:36
# First beat=11:46:23.992
# <age-range>: 40-44, <sex>: Male, <medication>: Moricizine
# <RR-low-limit(sec)>: 0.429,  <RR-high-limit(sec)>: 1.234
# Note: reel-to-reel recording, not flutter-compensated