Heart Sounds - AMA Manual of Style

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Heart Sounds 

Heart Sounds

Chapter:
Nomenclature
Author(s):

Harriet S. Meyer

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Heart Sounds

The 4 heart sounds and 4 components are commonly abbreviated in discussions of cardiac auscultatory findings; numerical subscripts are used.

S1 first heart sound

 M1 mitral valve component

 T1 tricuspid valve component

S2 second heart sound

 A2 aortic valve component

 P2 pulmonic valve component

S3 third heart sound

S4 fourth heart sound

Examples:

The presence of an audible S3was consistent with the patient’s ventricular aneurysm.

An audible S4 may be due to a variety of cardiac and systemic conditions.

Sound names may be written out in full when discussed generically.

Third heart sounds are suggestive of congestive heart failure, but an S3gallop may be a normal finding in children and young adults.

or:

The S3 is suggestive of congestive heart failure, but an S3 gallop may be a normal finding in children and young adults.

For plurals, follow the term with “sounds” or another noun.

S3 sounds [not S3s] may be normal or pathologic.

S3 gallops may be a normal finding in children and young adults.

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