Overview

The heart is a muscular organ about the size of a fist, located just behind and slightly left of the breastbone. The heart pumps blood through the network of arteries and veins called the cardiovascular system.The heart has four chambers: The right atrium receives blood from the veins and pumps it to the right ventricle. The right ventricle receives blood from the right atrium and pumps it to the lungs, where it is loaded with oxygen. The left atrium receives oxygenated blood from the lungs and pumps it to the left ventricle. The left ventricle (the strongest chamber) pumps oxygen-rich blood to the rest of the body. The left ventricle's vigorous contractions create our blood pressure.The coronary arteries run along the surface of the heart and provide oxygen-rich blood to the heart muscle. A web of nerve tissue also runs through the heart, conducting the complex signals that govern contraction and relaxation. Surrounding the heart is a sac called the pericardium.Cardiovascular disease, also known as heart disease, or coronary artery disease (CAD), is the number one killer in the United States. Diet and lifestyle play an important role in preventing and reversing heart disease, and certain herbs and supplements can help lower your risk for heart disease and treat heart conditions you've already been diagnosed with.Several herbs and supplements may help in fighting atherosclerosis, the underlying cause of most heart disease. Atherosclerosis causes plaque to build up in your arteries, blocking the flow of oxygen-rich blood to your heart and other organs. It can cause a heart attack and even death.Atherosclerosis is common in the developed world, but virtually unknown outside of it, due to the different diets and lifestyles of people in the developing world.

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