Heart failure is heart failure. Symptoms of heart failure after cardiac stenting may be caused by a larger damaged area of the patient’s heart, or it may be caused by acute myocardial infarction, myocarditis and other diseases. 1. Increase in the damaged area of the heart:When patients experience heart failure after cardiac stenting, it may be caused by the continued increase in the damaged area of the heart after stenting, so that patients will experience heart failure after cardiac stenting. 2. Acute myocardial infarction:Acute myocardial infarction is caused by coronary atherosclerosis, and the main symptoms of patients are weakness, chest discomfort, palpitations and so on. Therefore, patients will experience symptoms of heart failure after cardiac stenting. 3. Myocarditis:Myocarditis has many causes, including autoimmune factors, physical factors and so on. Patients will have fever, generalized tiredness, palpitation, arrhythmia and other symptoms, so patients will have heart failure manifestations after cardiac stenting. Patients should seek medical attention and follow the doctor’s instructions when they will have symptoms of heart failure after cardiac stenting.