7 lines (6 with data), 253 Bytes

m014b 0 128 0 15:46:00 07/06/1989
# Start time=15:46
# First beat=16:37:09.617
# <age-range>: 50-54, <sex>: Male, <medication>: Moricizine
# <RR-low-limit(sec)>: 0.468,  <RR-high-limit(sec)>: 0.96
# Note: reel-to-reel recording, not flutter-compensated