7 lines (6 with data), 250 Bytes

e046a 0 128 0 13:46:00 06/10/1987
# Start time=13:46
# First beat=13:54:10.070
# <age-range>: 55-59, <sex>: Female, <medication>: None
# <RR-low-limit(sec)>: 0.367,  <RR-high-limit(sec)>: 0.781
# Note: reel-to-reel recording, not flutter-compensated