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There are special cells in the heart that act as a natural pacemaker, sending electrical signals through their fibers to the heart muscle and regulating the heartbeat. An electrocardiogram reproduces these electrical patterns as a tracing. When there is a disturbance in any part of this conduction system, the heart may beat irregularly, or the rate may become either very slow or very fast. Irregular heartbeats can be life threatening in some cases, because the heart is unable to pump blood efficiently. Many people with heart rhythm disorders are able to live normal lives because of the invention of the pacemaker. This device is implanted in the body, and it sends electrical signals to the heart to keep the heart beating at a normal rate. Not everyone with heart rhythm disorders needs a pacemaker; some people can be treated with drugs. The heart has four sets of valves that control the flow of blood passing through its four chambers. Most problems are caused by narrowing and obstruction or incomplete closing. When a valve is defective and does not close completely, blood leaks back. These defects cause the heart to work harder to pump the blood, and can result in heart failure. The death of a loved one can sometimes lead to personal growth because we may see something about ourselves we did not see before - new resilience, for example. So even a death can be a good stress, though we grieve and are sad in the short run. Stress reduction depends entirely on the source of your stress. The only way to control stress that is beyond your control is to modify your response to it. For many women, this takes time and may require some work with a qualified counselor. If you are the source of your own stress because you are too hard on yourself, or are a perfectionist, you need to work on lowering your self-expectations and forgiving yourself for not being perfect. Increased heart rate, abnormal heart rhythm, shortness of breath, cough, fluid buildup in the body leading to swelling of the feet and ankles or abdomen, weakness, nad fatigue are some of the signs of heart failure. These vary, depending on the severity of the failure and the part of the heart affected. A variety of drugs can be prescribed to widen blood vessels, prevent the buildup of fluids, and strengthen heart contractions. In heart failure, the heart cannot pump enough blood to meet the body's needs. This may be due to heart muscle being weakened by conditions such as high blood pressure, myocardial infarction, or a mechanical failure in the valves. Heart failure does not mean that the heart stops pumping-that's called cardiac arrest-but rather that the heart is not working efficiently.
Article Source: http://www.bodyformind.com/db
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