Mitral P-wave is a prolonged P-wave on the ECG or a bimodal P-wave pattern. This kind of mitral P wave is mostly seen in mitral valve disease, such as mitral valve stenosis, mitral valve insufficiency, so after the appearance of mitral P wave, you also need to do a cardiac ultrasound, to see the opening and closing of the mitral valve, there is no mitral valve stenosis or insufficiency of closure exists. If there is stenosis or insufficiency, it is important to look at the degree of the stenosis or insufficiency. If the stenosis or insufficiency is only mild, there is no need to treat it. If the mitral stenosis or insufficiency is severe, it will seriously affect the blood flow of the mitral valve, so it needs to be treated by surgery to replace the valve.