Robert A Rosati M.D.

According to a new study, survivors of a heart attack who get angry easily and are stressed out will have increased chances of another heart attack. In this study, about 50% of the heart attack survivors who had very high scores for anger and stress on the psychological tests had a fatal or...

Atrial fibrillation refers to irregular heart rhythm with rapid heartbeat that affect the blood flow in the body.  In this condition, the irregular heartbeat starts in the upper chambers of the heart, the atria. The irregularity in the heart beat results from the problem in the electrical system of...

The liver primarily produces cholesterol. Each day, it makes 1,000 mg of cholesterol. The cells lining the small intestine can also produce cholesterol. If the level of cholesterol in the body is low, it may mean that the body is producing low amounts of cholesterol and is going to shut down. In...

IntroductionNicotine is an alkaloid stimulant that comes from the nightshade family of plants, particularly from the leaves of tobacco. The type of nicotine found in tobacco plants is called Nicotiana tabacum. Nicotine can also be synthetically produced. Thousands of chemicals are contained in...

Our heart rate is automatically controlled by the autonomic nervous system (ANS) that has two divisions: sympathetic and parasympathetic. The part of the ANS that is responsible for raising a person’s heart rate through the sympathetic plexus is the sympathetic division. The parasympathetic...

Introduction Tachypnea is a medical term, which means rapid and shallow breathing. This condition is often confused with hyperventilation, which is another type of abnormal breathing that is characterized by rapid but deep breathing. Both conditions are caused by carbon dioxide buildup in the...