What Is The S1 Heart Sound -

S1 occurs right after the electrical signal of the QRS complex on an ECG (the spike representing ventricular depolarization) and marks the start of systole (the contraction phase).

S1 is primarily caused by the closure of the Mitral (M) and Tricuspid (T) valves . what is the s1 heart sound

If you notice any new or unusual heart-related symptoms (palpitations, chest discomfort, shortness of breath), consult a medical professional—even if your “lub-dub” sounds normal to you. S1 occurs right after the electrical signal of