7 lines (6 with data), 253 Bytes

m082b 0 128 0 9:45:00 31/12/1990
# Start time=09:45
# First beat=10:05:32.273
# <age-range>: 55-59, <sex>: Male, <medication>: Moricizine
# <RR-low-limit(sec)>: 0.515,  <RR-high-limit(sec)>: 1.148
# Note: reel-to-reel recording, not flutter-compensated