Quadrivalvular rheumatoid heart disease associated with left bundle branch block.

@article{Carpenter1967QuadrivalvularRH,
  title={Quadrivalvular rheumatoid heart disease associated with left bundle branch block.},
  author={D F Carpenter and Abner Golden and William Clifford Roberts},
  journal={The American journal of medicine},
  year={1967},
  volume={43 6},
  pages={922-9}
}