Normal S1

What does "Normal S1" mean in a report or doctor's letter? In our medical dictionary, you will find a patient-friendly explanation of the meaning of this medical term.

Explanation

"Normal S1" refers to a specific sound that a doctor hears when listening to a patient's heart with a stethoscope. The heart makes two main sounds as it beats, named S1 and S2. S1 is the sound made when the heart's lower chambers, or ventricles, are squeezing blood out to the body. When a doctor says "Normal S1," it means this sound is as it should be, indicating that this part of the heart's function is normal.

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