About 84,600 results
Open links in new tab
  1. Fourth heart sound - Wikipedia

  2. S4 heart sound: Definition, uses, and heart health

  3. The Fourth Heart Sound - Clinical Methods - NCBI Bookshelf

  4. Physiology, Heart Sounds - StatPearls - NCBI Bookshelf

  5. Heart sounds - Wikipedia

  6. S4 Heart Sound Topic Review | Learn the Heart - Healio

  7. Heart sounds: What they are, and what is expected