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Understanding Heart Tones Video

ACLS Certification Association videos have been peer-reviewed for medical accuracy by the ACA medical review board.

Video at a Glance

  • This video reviews heart tones.
  • Remember the acronym: All Physicians Take Money. A=Aortic, P=Pulmonic, T=Tricuspid, M=Mitrol.
  • The video explains the exact locations to listen to each of these points.
  • Providers should hear a “lub-dub” sound. This is also called Sound 1 / Sound 2.
  • S1 is created by the mitral valve and the tricuspid valve closing, signaling the beginning of systole. S2 is created by the closing of the aortic and pulmonic valves, signaling the beginning of diastole.
  • A systolic murmur occurs after S1, and a diastolic murmur occurs right after S2.

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ACLS Certification Association (ACA) uses only high-quality medical resources and peer-reviewed studies to support the facts within our articles. Explore our editorial process to learn how our content reflects clinical accuracy and the latest best practices in medicine. As an ACA Authorized Training Center, all content is reviewed for medical accuracy by the ACA Medical Review Board.

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