There are more causes of panic and fast heartbeat, usually people do not notice their heartbeat, however, in some cases it can lead to a faster or stronger heartbeat than usual, many people will feel their heartbeat, this fast and strong beating is a normal reaction of the heart, which is usually called sinus tachycardia, the causes of which include violent mood swings, such as anxiety, pain, fear, exercise, anemia, hypotension, fever, dehydration, etc. However, in other cases, heart rhythm disturbances, which are professionally known as arrhythmias, can also cause panic. There is a wide range of arrhythmias, and there are harmless, non-obvious life-threatening arrhythmias that usually occur in people without heart disease and do not cause much harm to the body itself. The premature beats themselves are not felt, and what can be felt is that the normal heartbeat after the premature beats is slightly delayed and slightly stronger than usual due to the premature beats, although people feel as if their heart has beaten again, but This is not actually the case. Other arrhythmias that cause panic include paroxysmal supraventricular tachycardia, atrial fibrillation, or ventricular tachycardia, which cause the heart to beat much faster than normal.