The practical nurse (PN) is auscultating a client's heart sounds. Which abnormal heart sound should the PN report to the charge nurse? (Please listen to the audio file to select the option that applies.)

S3 is an extra heart sound that occurs during diastole (the filling phase of the cardiac cycle). It is commonly associated with conditions such as heart failure and volume overload. S3 is often described as a low-frequency, dull, and distant sound heard after S2 (the second heart sound). B, C- S1, and S2 are the normal heart sounds that are typically heard in all individuals. S1 is the first heart sound, heard as "lub," and is caused by the closure of the mitral and tricuspid valves. S2 is the second heart sound, heard as "dub," and is caused by the closure of the aortic and pulmonic valves. These sounds are normal and expected. S4 is another abnormal heart sound, which occurs during late diastole and is associated with conditions such as ventricular hypertrophy and reduced ventricular compliance.