👉 In medicine, a description of a condition where the heart or blood vessels are blocked or narrowed, leading to a feeling of being unable to breathe or have difficulty in breathing. This symptom can be caused by various conditions such as aortic aneurysm, pulmonary embolism, or coronary artery disease. It is characterized by shortness of breath, chest pain, or discomfort that lasts for more than 10 minutes and may worsen with exercise or deep breaths.