7 lines (6 with data), 254 Bytes

m218b 0 128 0 11:04:00 02/10/1989
# Start time=11:04
# First beat=11:29:44.101
# <age-range>: 35-39, <sex>: Female, <medication>: Moricizine
# <RR-low-limit(sec)>: 0.5,  <RR-high-limit(sec)>: 1.039
# Note: reel-to-reel recording, not flutter-compensated