Audrey H Wu MD

An arrhythmia is the violations of the frequency, rhythm, and sequence of heart contractions.Why do arrythmias occur?...

What is a persistent cough?It can be annoying to have a cough that lasts for more than a couple of weeks. A cough is considered chronic or persistent if it does not go away after four weeks in children and eight weeks in adults. However, most persistent coughs are due to colds, flu, infection, or...

A study published in the journal Circulation: Heart Failure, has shown that continuous use of anabolic steroids may weaken the heart. To add to the woes, researchers are not clear whether this change is a reversible one. In this study, weight lifters who took steroids regularly had impaired heart...

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...

What is cholesterol?Cholesterol is primarily produced in the liver, which makes approximately 1,000 milligrams of cholesterol per day. However, it can also be produced by the cells lining the small intestines and also by each cell present in the body. Abnormally low cholesterol levels would mean...

What Is Left-Sided Congestive Heart Failure?Heart failure means your heart is not able to work as well as it once did.Left-sided congestive failure is a critical condition in which the left side of the heart doesn’t pump blood efficiently. It is unable to meet the body’s metabolic needs,...