Beyond ejection fraction.

@article{Marmor1994BeyondEF,
  title={Beyond ejection fraction.},
  author={Alon T Marmor and Deeapli Jain and Barry Lewis Zaret},
  journal={Journal of nuclear cardiology : official publication of the American Society of Nuclear Cardiology},
  year={1994},
  volume={1 5 Pt 1},
  pages={477-86}
}