Can coronary heart disease cause vomiting blood?

Coronary heart disease generally does not cause hematemesis (vomiting blood). Coronary heart disease mainly results from stenosis or occlusion of the coronary arteries leading to myocardial ischemia, hypoxia, or necrosis. Its primary symptoms include chest tightness, palpitations, and chest pain, which are not directly associated with hematemesis. Hematemesis usually relates to upper gastrointestinal bleeding and may be caused by diseases such as gastritis, gastric ulcers, hepatitis, or cirrhosis. Therefore, if a patient with coronary heart disease experiences hematemesis, it may indicate the presence of comorbid conditions such as pulmonary infections (e.g., tuberculosis, bronchitis) or digestive system disorders. It is recommended to seek timely medical attention, undergo relevant examinations to determine the underlying cause, and receive targeted treatment to prevent delays in managing the condition.