S1 and s2 heart sounds11/25/2023 Many stethoscopes now offer tunable diaphragm technology. Here, your doctor will get the clearest resonance of the S1 sound. The mitral point is located at the left side of the sternum in the fifth intercostal space. They can also check for an opening snap, which is a high-frequency sound caused by the opening of the mitral or tricuspid valves, which may indicate a narrowing of the valves. Here your doctor can listen to the S1, or “lub”, sound. The tricuspid valve assists blood flow in the right direction while separating the upper and lower chambers of the heart. The tricuspid point is left of the sternum in the fourth intercostal space. Erb’s PointĮrb’s point is located to the left of the sternum in the third intercostal space and is the approximate center of the heart.Īt this point, the doctor will listen for both the S1 and S2 sounds. The typical S2 sound, referred to as the “dub” sound, should also be present at the pulmonic auscultation point. The pulmonic point is left to the sternum in the second intercostal space. Here the heart produces the S2 sound, which your doctor will listen for. This is where the doctor will place the stethoscope to listen to the sounds produced by the aortic valve. The aortic point is located on the right side of the sternum in the second intercostal space. The S2 sound follows, caused by the closure of the aortic and pulmonic valves. The S1 sound is caused by the closure of the mitral and tricuspid valves. These are also referred to as S1 and S2 sounds. Typically, the heart creates a “lub-dub” sound, which occurs when blood is being pumped and flowed to and from the heart. Stethoscope types should be chosen with consideration to the doctor’s needs and the type of patients they will be working with. To listen to the different points of auscultation, the doctor will use either a traditional or tunable stethoscope to determine if there are any abnormalities present and if further tests need to be performed. This short, yet important part of a health exam can tell a lot about the patient’s well-being. Cardiac auscultation refers to listening to the sounds of the heart with a stethoscope.
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