Precordial tremor refers to a regular tremor that is felt with the beating of the heart when the examiner presses the large fissure of the hand against a specific part of the chest wall of the person being examined during a physical examination. Different parts of the precordial tremor have different clinical significance: i. If the tremor is in the 2nd intercostal systole at the right edge of the sternum, it is mainly seen in aortic stenosis; ii. If the tremor is in the 2nd intercostal systole at the left edge of the sternum, it is mainly seen in pulmonary stenosis; iii. If systolic tremor is palpable in the apical region, severe mitral valve insufficiency is considered; if diastolic tremor is palpable in the apical region, mitral stenosis is the main cause.