John F. Marra M.D.

Recommended Articles

• Gout Complications

  Any medical problem left untreated can have devastating consequences. With gout, most people affected may experience a single gout attack that comes with severe pain in the affected joint. Soon thereafter, the symptoms may go away for weeks and even months, and the individual may forget about...

• What is Ischemia?

  Ischemia refers to the condition in which the muscles of the heart do not get an adequate supply of oxygen. This mostly happens because of reduced blood flow to the cardiac muscles either due to complete blockages or due to a partial block in the blood vessels that carry blood. This condition, also...

• What Conditions Increase Your Risk of Congestive Heart Failure?

  Heart failure, or congestive heart failure, is a chronic condition that indicates the inability of one’s heart to sufficiently fill with blood or distribute adequate amounts of blood to the entire body.Heart failure usually occurs in individuals with advancing age. However, anyone can develop the...

• What is Systemic Lupus Erythematosus?

  Systemic Lupus Erythematosus is a chronic autoimmune disease that affects several systems of our body. SLE is also known as discoid lupus or disseminated lupus erythematosus. How common is SLE? Out of all the types of lupus, SLE is the most common form. Systemic Lupus Erythematosus is a very common...

• What are the Causes and Symptoms of Ventricular Tachycardia?

  Tachycardia refers to rapid heartbeat, with more than 100 beats per minute. When this fast rhythm starts from the lower chambers of the heart (the ventricles) this condition is referred to as ventricular tachycardia. This fast beating heart rate may lead to a condition called ventricular...

• The Human Heart: Function, Chambers, and Location

  IntroductionThe human heart is a part of the cardiovascular system that is situated in the middle of the chest between the lungs. Its exact location is slightly positioned to the left and behind the sternum (breastbone). The size of the heart is approximately the size of your fist. Its function...