S4

S4 is the fourth heart sound, the "ta" of "ta-lub-dub," or the "chich" in "chich-a-ron." An S4 is also known as the Tennessee gallop because of the high density of patients with S4 gallops in this state.

Additional Topics

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• S1
• S2
• S3
• S5
• T1
• L1
• F5

References

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