A bacterium is a microscopic germ that can create human disease. According to the U.S. Centers for Disease Control and Prevention, over 160,000 people die due to infectious diseases, many caused by bacterial infections. People are exposed to numerous types of bacteria every day.

Plaque, a buildup of low-density lipoprotein (the so-called “bad” cholesterol), white blood cells, calcium and debris on the inside of the arteries, can lead to heart attack and stroke.

If you have just finished your morning cup of coffee, it’s not unusual to experience some initial symptoms like feeling jittery or experiencing heart palpitations. These palpitations may feel like your heart is racing, as if you cannot seem to control your heartbeat.

According to an June 2005 article in USA Today, a study lead by Merritt Raitt of the Portland VA Medical Center showed that fish oil supplements may trigger arrhythmia in patients who were already prone to irregular heart beat.

The use of garlic dates back to ancient times -- it has been used for many purposes, including as a means to treat heart disease. Garlic is still used by many to lower blood pressure, but the preparation and amount affects its blood pressure-lowering potential.

An enlarged heart, or cardiomegaly, is a symptom of another medical condition; it is not a disease in itself. The condition is often treatable if therapy is directed at treating the underlying cause of the heart enlargement.

If you've had a pacemaker implanted, you may be hesitant or cautious about resuming an exercise routine. You may be concerned about the pacemaker's ability to achieve or maintain an accelerated heart rate, your limitations in terms of strength, or the durability of the pacemaker.

If you have blocked or clogged arteries, it’s likely due to a buildup of fatty-deposit plaques. You may have a cardiovascular disease such as atherosclerosis, as well.

Swimming pools provide recreation and exercise for many different types of people. Unfortunately, some swimmers suffer allergic reactions from the chemical disinfection process needed to keep waters safe for bathers.

More than 65 million Americans suffer from high blood pressure, according to “Your Guide to Lowering Your Blood Pressure with DASH.” This condition occurs when the force of blood against your artery walls is persistently higher than normal, which should be 120 millimeters of mercury, or mmHg, over 80 mmHg, or lower.

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Head pressure, medically referred to as intracranial pressure, is pressure between the skull and the brain. Too much pressure in the head can restrict blood flow to the brain and press on structures in the brain.