Friction rub in heart sounds is described as which type of sound?

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Multiple Choice

Friction rub in heart sounds is described as which type of sound?

Explanation:
Friction rub is an abnormal heart sound. It happens when inflamed pericardial surfaces rub together, producing a scratchy, high-pitched noise that can be heard best with the patient leaning forward. This sound is not part of the normal sequence of heart sounds (S1 and S2) and isn’t a rhythm or a murmur. Murmurs come from turbulent blood flow across valves, while a friction rub comes from inflamed tissue rubbing against itself. Seeing a friction rub points toward pericardial inflammation, such as pericarditis, rather than a normal or benign finding.

Friction rub is an abnormal heart sound. It happens when inflamed pericardial surfaces rub together, producing a scratchy, high-pitched noise that can be heard best with the patient leaning forward. This sound is not part of the normal sequence of heart sounds (S1 and S2) and isn’t a rhythm or a murmur. Murmurs come from turbulent blood flow across valves, while a friction rub comes from inflamed tissue rubbing against itself. Seeing a friction rub points toward pericardial inflammation, such as pericarditis, rather than a normal or benign finding.

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