artificial heart


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Related to artificial heart: AbioCor Implantable Replacement Heart

heart, artificial,

external or surgically implanted mechanical device designed to replace a patient's diseased heartheart,
muscular organ that pumps blood to all parts of the body. The rhythmic beating of the heart is a ceaseless activity, lasting from before birth to the end of life. Anatomy and Function

The human heart is a pear-shaped structure about the size of a fist.
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. The first one used on a human being, the Jarvik-7, was implanted (1982) in Barney Clark, who lived for 112 days; another patient, William Schroeder, lived 620 days. Two major drawbacks of the Jarvik-7 were the danger of strokestroke,
destruction of brain tissue as a result of intracerebral hemorrhage or infarction caused by thrombosis (clotting) or embolus (obstruction in a blood vessel caused by clotted blood or other foreign matter circulating in the bloodstream); formerly called apoplexy.
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 from clots formed in the artificial heart and the need for the patient to be hooked to the external air compressor that powered the pump. By 1989 such devices had largely become a bridge to human heart transplants (see transplantation, medicaltransplantation, medical,
surgical procedure by which a tissue or organ is removed and replaced by a corresponding part, usually from another part of the body or from another individual.
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).

Beginning 2001, however, a second type of artificial heart, the AbioCor, was implanted in a number of patients. Unlike the Jarvik-7, the AbioCor is powered by electrical energy that is transmitted from a battery across the skin to an internal coil and backup battery. Because an opening in the skin is not needed to allow passage for tubes or wires, the risk of infection is greatly reduced. In addition, the external battery pack is designed to worn on a belt or suspenders, enabling the patient to be mobile. On average, the patients who received the heart from 2001 to 2004 and survived the operation lived for five months; the longest lived not quite 17 months. In 2006 the AbioCor was approved for use in patients who do not qualify for a heart transplant if their life expectancy as a result of heart failure is less than month; the device is also approved as a temporary measure for patients awaiting a transplant. A number of other artificial hearts have since been implanted temporarily or experimentally in patients, with varying degrees of success.

A related device, the ventricular assist device (VAD), or "artificial ventricle," is an internally implanted pump designed to aid a person with a failing left ventricle; unlike an artificial heart, it does not require removal of the patient's heart. A version for temporary use was developed in 1964. In 1991 doctors implanted the first portable VAD; it was powered by a battery pack. Its pump used a special interior lining to promote the growth of a surface similar to that which lines the blood vessels, reducing the risk of the formation of blood clots, which can cause stroke.


artificial heart:

see heart, artificialheart, artificial,
external or surgically implanted mechanical device designed to replace a patient's diseased heart. The first one used on a human being, the Jarvik-7, was implanted (1982) in Barney Clark, who lived for 112 days; another patient, William Schroeder, lived 620
..... Click the link for more information.
.

artificial heart

[¦ärd·ə¦fish·əl ′härt]
(medicine)
An endoprosthetic device used to replace or assist the heart.
References in periodicals archive ?
Therefore, CMS initiates this national coverage analysis for the artificial heart when used for bridge to heart transplantation and for destination therapy.
With more than 1,400 SynCardia Total Artificial Heart implants worldwide, surgeons and heart failure cardiologists have researched and provided abstracts on the SynCardia Heart," says Michael P.
The HeartQuest artificial heart development will continue to be supported through funding by the LDS Hospital-Deseret Foundation's Heart & Lung Research Foundation.
Just four days later, doctors implanted the Total Artificial Heart to save Mr.
Jack Copeland, a cardiac surgeon with then University Medical Center (now Banner-University Medical Center Tucson), and biomedical engineer Richard Smith, implanted a Total Artificial Heart (Jarvik 7 100cc heart, now known as the SynCardia TAH-t) into Drummond, a 25-year-old grocery store clerk.
He was able to leave the hospital just 44 days later, setting a new record for the fastest discharge of a Total Artificial Heart patient in Turkey.
The CardioWest Total Artificial Heart is a biventricular, pneumatic, pulsatile blood pump that completely replaces the patient's native ventricles and all 4 cardiac valves orthotopically," the authors explained.
Ankara University performed Turkey's first artificial heart implant on Feb.
It is an important step to making SynCardia's Total Artificial Heart technology available to patients who need it.
com), manufacturer of the world's first and only FDA, Health Canada and CE (Europe) approved Total Artificial Heart, announced today that the first patient to receive the SynCardia temporary Total Artificial Heart at Ankara University Heart Center in Turkey has been discharged from the hospital.
The operation would be easier and less expensive than implanting an artificial heart and could be ready for human use in two to five years, he estimates.
21, Golden gave his first sermon since receiving the SynCardia temporary Total Artificial Heart and being discharged home using the Freedom[R] portable driver.