If a patient has a fast heartbeat and panic attacks during daytime sleep, it may be due to the presence of cardiac neurosis or disorders of plant nerve function. In some patients, it cannot be ruled out that it is due to hyperthyroidism, anemia, or hypokalemia. All of the above are relatively common clinical causes that can trigger fast heartbeat and panic attacks. If you want to further clarify which problem is causing the symptoms of rapid heartbeat and panic, it is recommended to have an ambulatory electrocardiogram, in addition to serum ions, thyroid function and blood tests. In addition to the above-mentioned problems that can cause rapid heartbeat and panic, there are also patients who do not rule out the existence of heart failure or cardiomyopathy as a cause.