Males with anorexia are at particular risk for life-threatening medical problems, probably because they are diagnosed later than are females. Heart disease is the most common medical cause of death in people with severe anorexia. The heart can develop dangerous rhythms, including slow rhythms known as bradycardia. Blood flow is reduced and blood pressure may drop. In addition, the heart muscles starve, losing size.
Cholesterol levels tend to rise.
Heart problems are a particular risk when anorexia is compounded by bulimia and the use of ipecac, the drug that causes vomiting. Minerals such as potassium, calcium, magnesium, and phosphate are normally dissolved in the body's fluid. Calcium and potassium are particularly critical for maintaining the electric currents that cause the heart to beat regularly. The dehydration and starvation of anorexia can reduce fluid levels and mineral content, a condition known as electrolyte imbalance, which can be very serious and even life-threatening unless fluids and minerals are replaced. Reproductive and Hormonal Abnormalities.