Final answer:
Aortic regurgitation is characterized by a diastolic murmur that is high-pitched and blowing, coupled with a possible S3 or S4 sound which represent rapid filling or a hypertrophic ventricle respectively. An echocardiogram is typically used to confirm these auscultation findings.
Step-by-step explanation:
The auscultation findings for aortic regurgitation typically include a diastolic murmur, which may sound like a high-pitched, blowing decrescendo that occurs as the ventricles fill with blood during diastole. This murmur is best heard when listening with a stethoscope over the left sternal border. Additionally, an S3 or S4 sound may be present. The S3 sound can signify rapid ventricular filling, while an S4 sound implies a stiff or hypertrophic ventricle. Clinicians sometimes use the terms 'Kentucky gallop' and 'Tennessee gallop' to describe S1, S2, S3, and S4 when these sounds mimic those produced by galloping horses with distinct gait patterns. Moreover, echocardiogram investigations confirm the diagnosis of aortic regurgitation.