4. Nausea or Vomiting: Patients experiencing a heart attack may exhibit symptoms of nausea and vomiting, resulting from ischemia-induced congestion and increased secretion of gastric fluid. When chest pain and vomiting occur together, immediate medical attention is needed.
5. Angina Pectoris (Chest Pain): Angina pectoris is chest pain caused by insufficient blood supply to the coronary arteries. It often occurs behind the sternum, in the left shoulder or back, or radiates to the left arm. It may also be accompanied by symptoms such as difficulty breathing and upper abdominal discomfort. Angina pectoris can be a precursor to a heart attack, and if it occurs frequently, lasts for an extended period, or does not subside after rest, it should raise concerns.