Hypoglycemia generally does not cause heart failure, but if hypoglycemia is not corrected for a long time, it may cause heart failure. 1. Will not cause heart failure: mild to moderate hypoglycemia patients often only show symptoms such as panic, fatigue, sweating, etc., after proper supplementation of sugar, the symptoms of hypoglycemia will be relieved, and will not appear serious symptoms such as heart failure. 2. Can cause heart failure: severe hypoglycemia, without timely correction, due to hypoglycemia can cause myocardial damage, so there is a possibility of heart failure, especially the people who have heart disease themselves. In addition to heart failure, hypoglycemia can also cause damage to cerebrovascular, kidney and other organs, so it is important to pay attention to go to the hospital in a timely manner, so as not to delay the condition.