The present invention is related to a replaceable artificial heart comprising two heart like structures (2, 3) which are equivalent to right and left ventricles of the natural heart and are provided with an outer shell (4) surrounding the two heart like structures and an inner shell (5) provided in-between the two heart like structures, wherein it is capable of being implanted through keyhole surgery and transforming to an expanded rigid structure after having been implanted in the thoracic region, and re-transforming to a contracted soft structure within the thoracic region and vice versa, wherein the suction action around the ventricle like structures of the artificial heart is repeated in a continuous and uninterrupted manner so that it is capable of pumping the blood at a desired pressure in the entire body in a continuous and uninterrupted manner.
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