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Developments with artificial hearts
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An artificial heart is a mechanical device, about the size of an orange, which is connected to your heart or implanted in your chest to help or replace a weakening heart. It may have several valves, a mechanism to propel blood forward, and one or more chambers. Sometimes an artificial heart may help your heart temporarily, until yours recovers. If this is the case, the artificial heart will be removed when it is no longer needed. More commonly, when there is irreversible heart muscle damage and your heart can t recover, the artificial heart stays until you can have a heart transplant. If no other options are available, an artificial heart may completely and permanently replace your heart. There are two types of artificial heart. An artificial
heart that provides an extra ventricle (pumping chamber in your heart) to help to pump blood around your body. This is called a ventricular assist device (VAD). A VAD is made from metal and plastic, and has a small pumping chamber lined by a special material that stops blood clots forming. It may be put into your body or lie outside your body, depending on what type of artificial heart is being used. A VAD may be connected to you in various ways depending on if it needs to support the left side of your heart, the right side of your heart or both sides of your heart.
Transcatheter aortic valve replacement or TAVR is the latest technology used principally for the treatment of aortic stenosis, a condition in which one of the major valves of the heart, the aortic valve, becomes tight and stiff, usually as a result of aging (3). Since many patients who need aortic valve replacement for aortic stenosis are too sick to undergo major valve replacement surgery, they are unable to get the treatment they need. With the transcatheter aortic valve, this issue is bypassed because this valve can be implanted in the heart by accessing the patient’s heart through an artery in the groin. The valve can be inserted through a wire that can be pushed to the heart, and the old valve is simply pushed to the side when the new valve is implanted. This technology has been in use in the US with Edwards’ Sapiens valve since 2011 and has saved the lives of many patients with aortic stenosis (4).
Lidwell and Edgar H. Booth invented the first pacemaker. It was a portable device that consisting of two poles, one of which included a needle that would be plunged into a cardiac chamber. It was very crude, but it succeeded in reviving a stillborn baby at a Sydney hospital in 1928. The decades that followed, inventors came up with increasingly sophisticated versions of the pacemaker. However, these devices; which relied upon vacuum tubes; remained heavy and bulky, affording little or no mobility for patients. Colombian electrical engineer Jorge Reynolds Pombo developed a pacemaker in 1958 weighed 99 lbs and was powered by a 12-volt auto battery. Surgeons at the Karolinska Institute in Sweden were the first to place a fully implantable device into a patient in 1958. Rune Elmqvist and surgeon Ake Senning invented this pacemaker, which was implanted in the chest of Arne Larsson. The first device failed after three hours, the second after two days. Larsson would have 26 different pacemakers implanted in him. He died at the age of 86 in 2001, outliving both Elmqvist and Senning. In the world there are many heart attacks and as people grow they can get abnormalities in there heart(Medlineplus). When someone 's heart stops working it can be fixed with a pacemaker, it makes the heart beat properly. The artificial pacemaker is a wonder of modern science. A small, implantable device that regulates a human heartbeat through electrical impulses have saved millions of lives. The development of this vital medical device owes much to the advances in electronics and communications brought about by the Space Age.Pacemakers may be used for people who have heart problems that cause their heart to beat too slowly. A slow heartbeat is called Bradycardia two common problems that cause a slow heartbeat are sinus node disease and heart block. When your heart
In how many ways can a person change in the course of one novel? They can change a great deal. Alyss changed from rebellious and mischievous to beautiful and well-educated to. People change in many ways, some you can expect and some you just don’t understand.
In this figure, SN = sinus node; AVN = AV node; RA = right atrium; LA
. The layers of the heart wall include epicardium, myocardium, and endocardium. Epicardium is the surface of the wall and it’s also called visceral pericardium. It contains serous membrane covering the heart. Myocardium is in the middle of the two layers it’s described as having a thick muscular layer of the heart. It serves as having contractions of the heart as well in containing fibrous skeleton in networking of collagenous and elastic fibers. Some of the functions are providing structural support, attachment for cardiac muscle, and having electrical insulation. Endocardium is the inner lining that is smooth and contains epithelial. There is also the pericardial sac which allows the heart to beat without friction and the heart having room to expand and resist excessive expansion. It has three layers which include parietal pericardium the tough outer layer, pericardial cavity is filled with pericardial fluid, and visceral pericardium which is thin, smooth, and serous layer covering the heart surface.
Can it truly be love when you only love a certain aspect of a person or only a delusion? Don Williams, not to be confused with the American country singer, is a prize winning columnist and the founding editor as well as the publisher of New Millennium Writings. He addressed this very question in his short story Her Vagabond Neon-Heart (2004). Loretta Garner was a restless soul, unhappy with where she was in life and the male character of the story, a confident trial lawyer named Dewey was content on taking advantage of this. He enjoyed the fact that he could always reel her back in when she went astray, assuming that she would never actually leave. This became a beloved part of his routine. It wasn’t until she followed her heart and left for
The film that I’ve decided to analyze would be Ryan Murphy’s The Normal Heart. The sequence within the film that I’ve decided to analyze was not an easy choice considering this film has several amazing scenes and sequences. Nevertheless, the sequence that I’ve chosen is within the time segment of 83:15 – 85:35. The Normal Heart is a film that I truly believe to be cinematic beauty. The film follows the rise of the HIV-AIDS crisis in New York City between 1981 and 1984 through the eyes of writer/activist Ned Weeks, the founder of a prominent HIV advocacy group, portrayed by Mark Ruffalo. The film sequence that I chose is a prominent part of the film and one of the moments that stood out to me the most. It is the part where Ned Weeks comes home to find his lover Felix Turner,
The Tell-Tale Heart: An Analysis In Edgar Allan Poe’s short-story, “The Tell-Tale Heart,” the storyteller tries to convince the reader that he is not mad. At the very beginning of the story, he asks, "...why will you say I am mad? " When the storyteller tells his story, it's obvious why. He attempts to tell his story in a calm manner, but occasionally jumps into a frenzied rant.
Edgar Allan Poe author of “The Tell-Tale Heart” used literary devices to create mystery and suspense. Poe used personification in the 2nd paragraph which added character to his story, “evil eye”. This is an example of personifications because an eyeball cannot be evil itself, Poe gave the cataract eye the characteristic of evilness to suggest to the reader that it was really a bother to him. “Black as pitch” found in paragraph 3, is an example of a simile. By using a simile in his story I think that Poe gave his story variety. He described the rooms lack of light through a simile which was very creative in my opinion. Finally, Edgar Allan Poe uses imagery repeatedly to help the reader picture what is going on in his story. An example of this
The rich, in essence, can buy life, whereas the poor are abandoned to die in a
The Normal Heart can be analyzed through a structural functionalist theory. Structural functionalist theory looks at society as a complex system with parts that work together to promote solidarity and stability. This approach stresses social solidarity, divided into organic and mechanical classification according to general type, and stability in social structures. In the early stages of the film society works as a whole, with the homosexual community being more accepted than they would have been in previous decades. The 1980s welcomed gay activism in the New York social scene with New York City as a safe place where gays were free to walk down the street hand in hand without fear of much discrimination (Elizabeth
The heart is a pump with four chambers made of their own special muscle called cardiac muscle. Its interwoven muscle fibers enable the heart to contract or squeeze together automatically (Colombo 7). It’s about the same size of a fist and weighs some where around two hundred fifty to three hundred fifty grams (Marieb 432). The size of the heart depends on a person’s height and size. The heart wall is enclosed in three layers: superficial epicardium, middle epicardium, and deep epicardium. It is then enclosed in a double-walled sac called the Pericardium. The terms Systole and Diastole refer respectively and literally to the contraction and relaxation periods of heart activity (Marieb 432). While the doctor is taking a patient’s blood pressure, he listens for the contractions and relaxations of the heart. He also listens for them to make sure that they are going in a single rhythm, to make sure that there are no arrhythmias or complications. The heart muscle does not depend on the nervous system. If the nervous s...
The behavior of the narrator in The Tell-Tale heart demonstrate characteristic that are associated with people with obsessive-compulsive disorder and paranoid schizophrenia . When Poe wrote this story in 1843 obsessive-compulsive disorder and paranoia had not been discovered. However in modern times the characteristics demonstrated by the narrator leads people to believe that he has a mental illness. Poe’s narrator demonstrates classic signs throughout the story leading the reader to believe that this character is mad
Heart transplant is a surgical procedure to remove a person’s diseased heart (orthotopic approach) and replace by a healthy heart from an organ donor. Less commonly, heart transplant can be carried out without the removal of diseased heart and a healthy heart will be positioned (heterotopic approach) to encourage the recovery of the diseased heart of the recipient.
The Tell-tale Heart is a short story which was written by an American writer by the name of Edgar Allan Poe who was born on January 19, 1809. His story is mainly about an old man’s murder. It was published in January 1843, it talks mainly about a man with no specific name who kills an old man for just a strange reason. Poe gives the story about the murder in order to prove himself as not insane. The fictional scenarios the narrator describes in the story shows various traits of the narrator’s character which is helpful to the readers in terms of their feelings towards murder and confessions among others thus reminds the readers of how evident they are in the tale.