If the heart beats abnormally fast – this is tachycardia. A strong beat is not a disease – it is either a physiological condition of the body, or a symptom of one of many diseases.
Esophageal cancer develops during the degeneration of epithelial cells in different layers of the tube through which food from the oral cavity enters the stomach. The process involves the formation of atypical cells, the number of which grows along with the size of the tumor. The disease is more often detected in men. More susceptible to people from 45 years. In Europeans, pathology is 6 times more common than in Africans.