Symptoms of high creatine kinase isoenzyme are mainly chest pain, palpitations, fatigue, nausea, vomiting, arrhythmia, etc. The specific symptoms vary from patient to patient. Creatine kinase isoenzyme is a kind of cardiac enzyme, which mainly exists in the human heart muscle cells, when the human heart muscle tissue is damaged, the creatine kinase isoenzyme will be elevated to a certain extent. Common forms of myocardial damage include acute myocarditis and acute myocardial infarction. Patients with acute myocarditis mainly have symptoms such as shortness of breath, dyspnea, chest tightness or chest pain, palpitations, dizziness, extreme fatigue, and a marked decrease in appetite; patients with acute myocardial infarction mainly have persistent and severe chest pain, as well as nausea, vomiting, profuse sweating, and tachycardia. Patients with the above symptoms must immediately seek medical attention for standardized examination and treatment.