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Alternative namesCHF; Congestive heart failure
Heart failure, also called congestive heart failure, is a disorder in which the heart loses its ability to pump blood efficiently. The term "heart failure" should not be confused with cardiac arrest, a situation in which the heart actually stops beating.
Causes, incidence, and risk factors
Heart failure is almost always a chronic, long-term condition, although it can sometimes develop suddenly. This condition may affect the right side, the left side, or both sides of the heart.
As the heart's pumping action is lost, blood may back up into other areas of the body:
With heart failure, many organs don't receive enough oxygen and nutrients, which damages them and reduces their ability to function properly. Most areas of the body can be affected when both sides of the heart fail.
The most common causes of heart failure are the chronic cardiovascular diseases hypertension (high blood pressure) and coronary artery disease . Other structural or functional causes of heart failure include the following:
Approximately 2 out of every 100 people between the ages of 27 and 74 have heart failure. Heart failure becomes more common with advancing age.
Infants may sweat during feeding (or other exertion).
Some patients with heart failure have no symptoms. In these people, the symptoms may develop only with these conditions:
Other risk factors include obesity , excessive alcohol consumption, and a high-salt diet.
Signs and testsA physical examination may reveal either an irregular or a rapid heartbeat. There may be distended neck veins, enlarged liver , swelling of the limbs (peripheral edema), and signs of fluid around the lungs (pleural effusion).
Listening to the chest with a stethoscope may reveal lung crackles or abnormal heart sounds . Blood pressure may be normal, elevated or low.
An enlargement of the heart or decreased heart functioning may be seen on several tests, including the following:
This disease may also alter the following test results:
If excessive fluid has accumulated around the sac surrounding the heart (pericardium), you may need to have the fluid removed through a pericardiocentesis .
Heart failure must be monitored by your health care provider. The first step is usually to identify and treat any underlying disorders and precipitating factors. This may require a thorough diagnostic work-up, medications, catheter procedures, or surgery.
The goals include reducing the heart's workload, controlling excess salt and water retention (swelling, reduced urinary output) and improving heart function. In advanced cases or when the heart failure occurs suddenly (acute heart failure), bed rest or reduced physical activity are recommended to minimize the heart's workload.
If salt and fluid intake have been reduced and swelling persists or there are signs of severe systemic (body) or pulmonary (lung) congestion, it may be necessary to use diuretics (water pills). Diuretics include:
Digoxin may also be given, especially if the heart rhythm is irregular due to atrial fibrillation.
Medications to reduce the heart's workload include ACE inhibitors such as captopril and enalapril, and angiotensin receptor blockers such as losartan and candesartan. Vasodilators such as hydralazine and long-acting nitrates are also commonly used.
The majority of patients, particularly those with a history of coronary artery disease, may benefit from low doses of beta-blockers.
Weight loss may be recommended for overweight patients. Patients should also reduce smoking and excessive alcohol consumption, because these decrease the pumping efficiency of the heart.
The heart's ability to pump blood can be directly increased by medications called inotropic agents. These include dobutamine and milrinone, which are given intravenously.
Unstable patients receiving several medications usually need also hemodynamic monitoring with Swan-Ganz catheterization.
Severe cases require more drastic measures. For example, excess fluid can be removed through dialysis , and circulatory assistance can be provided by implanted devices such as the intra-aortic balloon pump (IABP) and the left ventricular assist device (LVAD). These devices can be life-saving, but they are not permanent solutions. Patients who become dependent on circulatory support will need a heart transplant .
Expectations (prognosis)Heart failure is a serious disorder that carries a reduced life expectancy. Many forms of heart failure can be controlled with medication and correction of underlying disorders. Heart failure is usually a chronic illness, and it may worsen with infection or other physical stressors.
Possible side effects of medications include:
Calling your health care provider
Call your health care provider if weakness, increased cough or sputum production, sudden weight gain or swelling, or other new or unexplained symptoms develop.
Go to the emergency room or call the local emergency number (such as 911) if you experience severe crushing chest pain, fainting, or rapid and irregular heartbeat (particularly if other symptoms accompany a rapid and irregular heartbeat).
PreventionFollow your health care provider's recommendations for treatment of conditions that may cause congestive heart failure. Follow dietary guidelines. Reduce or eliminate smoking and alcohol.
Update Date: 2/13/2004Fabian Arnaldo, M.D., Department of Cardiology, Henry Ford Hospital, Detroit, MI. Review provided by VeriMed Healthcare Network.
Last updated: Tue, 06 Jan 2009 00:20:03 GMT