7 lines (6 with data), 250 Bytes

m092b 0 128 0 13:45:00 11/07/1989
# Start time=13:45
# First beat=16:03:42.718
# <age-range>: 45-49, <sex>: Female, <medication>: Moricizine
# <RR-low-limit(sec)>: NA,  <RR-high-limit(sec)>: NA
# Note: reel-to-reel recording, not flutter-compensated