Living without Heartbeat (part 2)

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Living without Heartbeat (part 2)

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Andrew Whales

A ventricular assist device or VAD has a screw-like rotor blades that pushes the forward in a continuous flow. VADs are already implanted to thousands of peoples to help their weak heart. The doctors used two VADs to replaced both the right and left ventricles and function as the entire heart.

Doctors believes that the newly developed heart should last longer that other artificial hearts and it would cause much less problems and complications. The reason for such case is the fact that each side of the artificial hear has just one moving part which is the constantly whirling rotor.

Cohn believes that having a pulse is not that necessary to live. The direction of creating an artificial heart were all directed to producing that pulsating pumps as what is observed in animals to have pulsative circulatory systems. He says, the only reason blood must be pumped rhythmically is the heart tissue itself. He explains that the pulse is only essential for the heart because it can only get nourishment in between them. Other organs has no problem with absence of the pulses. The pulse-less heart only produce humming sounds which is created by the continuous whirling of its mechanical parts.

Craig Lewis live more than a month having the pulse-less artificial heart. He died due to underlying Amyloidosis which has clogged his other organs. His doctors says the pumps worked flawlessly. Dr. Cohn said that their hearts don't wear out, and no failure has been seen to date.

There are many Biomedical companies all over the globe that are still on the quest to prefect their pulsative hearts. Dr. Cohn believes that their efforts could one of invention history's dead ends.

He compared them when men are trying to make machines that fly. He said men looked at nature and fixed machines that have wings. But when someone knew that crated wind over a fixed wing can give that lift, the direction of the flight developments shifted. He thinks that this same intellectual leap in artificial hearts.

There are still a lot of work need for the pulse-less heart to be out on the market. First is they have to finalize the design, find a manufacturer and get the device approved by FDA.

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Tags: • fda • biomedical • doctors • artificial heart •

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