7 lines (6 with data), 248 Bytes

e188a 0 128 0 12:05:00 25/03/1989
# Start time=12:05
# First beat=12:27:12.929
# <age-range>: 55-59, <sex>: Male, <medication>: None
# <RR-low-limit(sec)>: 0.507,  <RR-high-limit(sec)>: 1.281
# Note: reel-to-reel recording, not flutter-compensated