A cardiac monitor PVC showing 0 may be normal, a value known clinically as premature ventricular contraction, or premature ventricular contraction for short, which has a high degree of variability, or it may be abnormal if it is due to an organic pathology. Premature ventricular contractions are a common arrhythmic disorder, most of which can be diagnosed during cardiac auscultation; they occur more frequently in the morning and less frequently at night, so 24-hour and longer ambulatory monitoring is needed to understand the frequency of premature ventricular contractions. The patient has no discomfort at the beginning, but slowly develops occasional palpitations, and in the later stages, the patient may experience a pounding sensation in the precordial area and dizziness, fainting, or blackouts. Ventricular premature is mostly seen in normal people, and there are many triggers, smoking, drinking and other functional causes, usually without treatment; but if it is an organic lesion, you need to go to the hospital in time, and follow the doctor’s instructions for treatment.