Patients who suddenly become dizzy and have difficulty in their hearts should mainly consider the following aspects: 1. If patients have panic attacks and palpitations, they should consider that they are caused by premature ventricular contractions. Premature ventricular contraction is a relatively common situation in daily life. Premature ventricular contraction episodes, if more frequent, may lead to reduced pumping function of the heart, resulting in reduced pumping of the heart, which will cause the brain tissue to be in a state of ischemia and hypoxia, and patients will experience dizziness. However, the patient’s dizziness will also be accompanied by panic and chest tightness, which are symptoms of cardiac hypoxia. 2. Patients who suddenly become dizzy and have difficulty in their hearts, if they have a transient dizziness and visual rotation during the change of head position, should be considered to be caused by otoliths. This condition may lead to sympathetic nerve stimulation, so that the patient may also have heart difficulty or gastrointestinal discomfort, such as nausea, vomiting, sweating, some of these symptoms.