Numerous diseases can cause lightheadedness and stomach sickness. According to the U.S. National Library of Medicine and the National Institutes of Health, dizziness is lightheadedness, or the feeling of imminent fainting. Lightheadedness occurs when there is inadequate blood flow to the brain.

Cholesterol is a fatty substance that your body makes and uses for important functions. You also get cholesterol from the foods you eat. Too much cholesterol in your blood can cause the buildup of plaque in your arteries, a condition called hardening of the arteries or atherosclerosis.

The blood vessels that lie on either side of your neck and carry blood from your heart to your brain are called the carotid arteries.

Digoxin is a medicine used to treat certain heart conditions. It can be used to treat congestive heart failure, a condition in which the heart muscle is weak and unable to pump blood effectively to the rest of the body.

A new Cleveland Clinic study revealed that Americans don't know much about risk factors that could prevent heart disease.

Exercise is crucial to health and having a full, active life at any age. While risk factors for illness and ailments increase with age, exercise can help offset those risks. Exercise can reduce the risk of hypertension, heart disease, diabetes, osteoarthritis and osteoporosis in seniors.

Vitamin B6, also referred to as pyridoxine, is an essential component for your health. This vitamin aids in the conversion of food into energy, maintains healthy hair, skin and eyes, and cleanses the liver. It is also responsible for normal brain function and development, as well as the production of red blood cells.

Coronary arteries carry blood to the heart muscle. In coronary artery disease, or CAD, LDL cholesterol builds up inside these arteries, forming plaque that causes them to become narrow, blocking or slowing the flow of blood and oxygen needed for proper heart function.

The average adult has over 8 lbs. of skin, and it is the largest organ in your body. Your skin serves many purposes, but one of its major functions is to protect the body from infectious organisms, such as parasites, bacteria or viruses, that cause disease.

Plaque is a substance made up of fat, cholesterol and calcium that builds up in the coronary arteries that supply the heart with oxygen-rich blood, according to the National Heart, Blood and Lung Institute.

Unusual leg heaviness can occur suddenly while you are climbing up stairs, making it virtually impossible to continue to the top. Because heaviness in the legs can sometimes signal a serious medical condition, understand why it occurs and how it can be treated.

A rapid heart beat, medically known as tachycardia, may arise for many different reasons. The heart normally beats between 60 and 100 times per minute, and a heart rate greater than 100 beats per minute defines tachycardia.