Thursday, December 15, 2011

What is Heart Failure?

Heart failure is a state in which the heart can't pump enough blood throughout the body. Heart failure does not mean that your heart has stopped or is about to stop working. It means that your heart is not able to push blood the way it should.
The failing of the heart's pumping capacity cause

  • Blood and fluid to back up into the lungs 
  • The buildup of fluid in the feet, ankles and legs 
  • Tiredness and shortness of breath
Heart failure (see the images below) can be caused by myocardial breakdown but may also occur in the occurrence of near-normal cardiac function under conditions of high demand. Heart failure always origin circulatory failure, but the converse is not necessarily the case, because various noncardiac conditions (eg, hypovolemic shock, septic shock) can produce circulatory failure in the presence of normal, modestly impaired, or even supranormal cardiac function. To continue the pumping function of the heart, compensatory mechanism increase blood volume, cardiac filling pressure, heart speed, and cardiac muscle mass. However, despite these mechanisms, there is progressive decline in the capability of the heart to contract and relax, resulting in worsening heart failure.

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