7 lines (6 with data), 253 Bytes

m088b 0 128 0 10:50:00 25/08/1989
# Start time=10:50
# First beat=11:06:14.796
# <age-range>: 50-54, <sex>: Male, <medication>: Moricizine
# <RR-low-limit(sec)>: 0.609,  <RR-high-limit(sec)>: 1.46
# Note: reel-to-reel recording, not flutter-compensated