The main causes of dizziness and fast heartbeat are: first, physiological, such as emotional excitement, long-term insomnia, strenuous exercise, drinking strong tea or coffee, etc. These are physiological, change the habits of life, maintain a happy mood, a reasonable diet, appropriate exercise, the symptoms will improve without special treatment. Second, pathological, that is, organic causes, may be cardiovascular causes, such as arrhythmias, including ventricular tachycardia, supraventricular tachycardia, pre-excitation syndrome, etc., resulting in insufficient blood supply to the brain and thus dizziness, encounter this situation need to do electrocardiogram, cardiac ultrasound, if necessary, coronary angiography, clear etiology and diagnosis for etiological treatment. There may also be non-cardiovascular causes, such as hypoglycemia, hyperthyroidism, anemia due to various causes, fever, etc. All of these need to be treated by specific tests to clarify the cause, and the symptoms will improve significantly.