Excessive burping does not cause a heart attack, but can be a symptom of angina, which is caused by heart disease, reports PubMed Central. Studies generally relate belching to myocardial infarction chest pain, but medical textbooks do not report belching without heart pain as an angina symptom.
In one case, a 63-year-old male with a normal health history experienced two months of belching episodes and stomach gas not related to meals, medications, allergies or surgeries, notes PubMed Central. The symptoms occurred after exertion, such as climbing stairs. A battery of diagnostic tests produced normal results, except for a stress test electrocardiogram that was positive for angina pectoris. The patient had a 50 percent blockage of his left anterior descending circumflex artery, and 98 percent of his right coronary artery and its branch were blocked. After undergoing coronary bypass surgery, the patient no longer experienced the belching.