Mark W Sheehan M.D.

What is a HIIT Workout?HIIT workout plans are intensive and punishing, but there are good reasons why they are very popular. HIIT stands for high-intensity interval training. As its name implies, it is an explosive and high-power workout. It is not a specific workout or exercise routine. Rather,...

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...

Coronary heart disease is a very common condition characterized by high LDL levels and blood pressure. A cardiac stress test by increasing the speed and inclination on a treadmill helps to diagnose the condition. Surgery and medication are common treatment strategies opted for when diagnosed with...

What is High Blood Pressure?High blood pressure is a condition whereby an individual’s blood vessels become strained due to high pressure by the blood flowing in them. It’s a dangerous condition not because it has any negative side-effects on its own but because of the potential health problems...

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...

Lupus is an unpredictable, multi-organ disease, and in some it may have milder course characterized by skin rashes or muscular aches, while in others it may start abruptly with predominant symptoms of some serious illness. It is not uncommon for lupus patients to present with the symptoms of kidney...