Palpitations and panic attacks usually have the following factors: 1. Physiological factors, normal people will experience palpitations and panic attacks under physiological conditions, such as when they are emotionally excited, mentally stressed, anxious or quoting large amounts of strong coffee or tea. 2. This includes hypoglycemia. Patients with hypoglycemia will experience typical palpitations, dizziness, and profuse sweating. Such symptoms can also occur in diseases of other endocrine systems, such as hyperthyroidism and hyperadrenocorticism. There are also circulatory system diseases, such as coronary artery disease, myocarditis, pericarditis, and inadequate blood supply to the heart, when such clinical manifestations are present.