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Monday, 22 June 2015

Heart surgery

The first time heart surgery was performed was on September 4, 1895 at Rikshospitalet in Kristiania, now Oslo. Norwegian surgeon Axel Cappelen ligated a bleeding coronary artery in a 24-year-old man who had been stabbed in the left axillae. The patient awoke and seemed fine for 24 hours, but became ill with increasing temperature and he ultimately died from what the post mortem proved to be mediastinitis on the third postoperative day.

The first successful surgery of the heart, performed without any complications, was by Dr. Ludwig Rehn of Frankfurt, Germany on September 7, 1896. He repaired a stab wound to the right ventricle suffered by 22-year-old gardener Wilhelm Justus.

Until the 1960s if you had a terminally dodgy heart you would be sent to hospital and hooked up to a large, static piece of kit. US engineer Wilson Greatbatch was the first build a reliable fully implantable pacemaker in his garden shed. He tested a prototype on a dog in 1958 and, in 1960, Henry Hannafield, 77, became the first human recipient. Hannafield lived for a further 18 months.

Before the heart/lung machine was invented, a doctor oxygenated his patient's blood by routing it through another person. Parents often served this purpose while their children had heart surgery.

Christiaan Barnard performed the first successful human heart transplant at Groote Schuur Hospital, Cape Town, South Africa on December 3, 1967. A 54-year-old, Louis Washkansky, received a heart from a 24-year-old woman, who had died in a motor accident. He died of pneumonia 18 days later as drugs given to prevent tissue rejection had heightened the risk of infection.


Paul Winchell, who was the original voice of Tigger, Dick Dastardly, and other characters, was also a prolific inventor. He was the first person to build and patent a mechanical artificial heart, later donating the patent to the University of Utah. 

Frederick West became the first British patient to receive a heart transplant on May 3, 1968 at the National Heart Hospital in Marylebone, London. He died 46 days later from an infection.


61-year-old retired dentist Barney Clark was the first recipient of a permanent artificial heart on December 2, 1982 at the University of Utah Medical Center. He survived for three and a half months with his new heart before succumbing to foreign-body rejection problems.

Stephanie Fae Beauclair was an American infant who died of heart failure on November 15, 1984, at 22 days old. She was the first infant to receive a cross-species heart transplant, having been give a baboon's heart. The transplant was performed on October 26, 1984, at Loma Linda University Medical Center in California. 

Beauclair was born with hypoplastic left heart syndrome, a congenital heart defect in which the left side of the heart is underdeveloped. The transplant was a last-ditch effort to save her life. The cause of her death was never determined, but it is possible that her body rejected the baboon heart.

In 1985 William J. Schroeder became the first artificial heart recipient to be discharged from the hospital.


62-year-old former movie stuntman Arthur Cornhill was given the world’s first battery operated heart in a pioneering operation at Papworth Hospital in Cambridgeshire, England on August 26, 1994. The heart was made from titanium and plastic and the operation was performed by an 11-man team led by top heart surgeons Sir Terence English and John Wallwork.

Teenager D’Zhana Simmons of South Carolina survived for nearly four months without a heart, kept alive by a custom-built artificial blood-pumping device until she was able to have a heart transplant. She had a heart transplant on July 2, 2008 at Miami’s Holtz Children’s Hospital but the new heart failed to function properly and was quickly removed. She essentially lived for 118 days without a heart, with her circulation supported only by the two blood pumps before doctors implanted another heart on October 29, 2008. 

Around the world, about 3,500 heart transplants are performed each year. More than half of these are in the United States.

Cardiac surgical procedure at Gemelli Hospital in Rome. By Pfree2014 - Wikipedia Commons

Men are 1.6 times more likely to undergo by-pass surgery than women.

Heart Attack

A heart attack, also called an acute myocardial infarction, happens when a blood vessel in the heart suddenly becomes blocked. Blood vessels carry blood and oxygen and when part of the heart does not get enough oxygen it is called ischemia and causes chest pain. If the ischemia lasts long enough, the heart muscle that is not getting enough oxygen dies, which is called an infarction. "Myocardial infarction" means "infarction (muscle death) in the heart muscle. 

Myocardial Infarction y Blausen Medical Communications, Inc

When a woman has a heart attack, the signs tend to be nausea, shoulder ache and indigestion, not the chest pain that men suffer.

One person in the United States dies of a heart attack every 60 seconds.

Asians are more likely to die from heart failure on the 4th of the month than they are any other day of the month (7.3% death rate above expected), due to increased stress from Tetraphobia (their cultural fear of the number 4). This has been termed the Baskerville effect.

Worldwide, 17.3 million people die every year from heart disease or stroke, which account for 31 per cent of all deaths.

Each year, about 843,000 turkeys die of a heart attack.

"World Heart Day" was founded by the World Heart Federation in 2000 to inform people around the globe that heart disease and stroke are the world’s leading causes of death, It is celebrated on September 29 every year.

Although it is commonly shown in medical dramas, you do not shock someone with a flatline. You only use defibrillators on people with ventricular fibrillation, and pulseless ventricular tachycardia (heart beats out of rhythm or heart beats that are really fast and out of sync).

A defibrillator doesn't restart a stopped heart. In fact quite the opposite, it actually stops a heart in the middle of a cardiac event, allowing the heart’s natural back-up system to take over and return it to normal sinus rhythm.

Shoveling snow is a known trigger for heart attacks. Some hospitals even prepare for more cardiac related visits after a large snowfall.

British actor Gareth Jones died of a heart attack at the age of 33 while performing in a live televised play Underground in 1958 – in which his character was scripted to have a heart attack. The rest of the cast improvised around his death and the director hurriedly redistributing Jones's lines during the interval enabling them to finish the play.

One of the comedian Redd Foxx signature running gags involved faking a heart attack by putting his hand on his chest and saying "It's the big one, I'm coming to join ya honey/Elizabeth" (referring to his late wife). So when he had a real heart attack on the set of his television show on October 11, 1991, his castmates thought he was trying to be funny. It proved to be fatal and Foxx died later the same day.


On the day the Netherlands lost to France in a penalty shoot-out at Euro 1996, the death rate from heart attacks and strokes among Dutchmen rose by 50 per cent compared with an average day.

Howard Snitzer, 54, had a massive heart attack at a grocery store in rural Minnesota one wintry evening in 2011. 20 people lined up and performed CPR on him for over an hour and a half until paramedics arrived and he survived.

Morning is the most common time for people to have a heart attack. When you wake up, the stress hormone cortisol is at its peak. Get out of bed slowly, stretch, and drink a glass of water. Dehydration makes it easier for blood clots to form.

"Stayin' Alive" and "Another One Bites The Dust" have the optimum tempo for performing CPR on someone who has just suffered a heart attack. However, the latter song doesn't seem quite as appropriate.

Heart

HEART ANATOMY

Aristotle believed that the heart was the source of intelligence and the body's source of heat. He thought that the  main function of the brain was to cool our blood. This belief continued into the Middle Ages.

Leonardo Da Vinci once conducted an experiment to understand the flow of blood through the valves of the heart, by pouring hot wax into one, making a mould of thin glass from the cast, and then pumping water mixed with seeds through it. He saw how a heart actually regulates itself.

Dr. J. Andrew Armour of the University of Montreal discovered in 1991 that the heart has its "little brain" or "intrinsic cardiac nervous system." that the heart has its "little brain" or "intrinsic cardiac nervous system." This "heart brain" is composed of approximately 40,000 neurons that are alike neurons in the brain, meaning that the heart has its own nervous system.

If you want to imagine how big your heart is, make a fist with your hand. Your heart is about the same size as the fist of your hand.

The heart of an astronaut actually gets smaller when in outer space.

An average man's heart weighs 10-12oz; an average woman's heart weighs 8-10oz.

The right-hand side of your heart pumps blood into the lungs to pick up oxygen, the left side pumps oxygenated blood round the body.

Over a lifetime, the human heart pumps enough blood to fill a football stadium.

The human heart creates enough pressure while pumping to squirt blood 30 feet.

The corneas of your eyes are the only cells in your body that do not receive a blood supply from the heart.

The heart of an unborn baby begins to beat about four weeks after conception.

In an average lifetime, a human heart will beat almost three billion times.

Heart normal anterior exterior anatomy. By Patrick J. Lynch, medical illustrator - Wikipedia Commons

Women's hearts beat faster than men's: an average of 78 beats a minute compared with 72.

The energy of a day's heart-beating would be enough to drive an average truck 20 miles.

The sound of a heartbeat is the noise made by the four valves of the heart closing.

In Indonesian, the onomatopoeia for a heartbeat is "Dig dag dug."

"Rubatosis" is the unsettling awareness of your own heartbeat.

Middle aged men with resting heart rates of 80 beats or higher per minute are likely to die four to five years earlier than men with resting heart rates of 65 beats per minute or less.

The human heart is not heart-shaped. A cow's heart is more heart-shaped than a human one.

THE HEART IN CULTURE

The heart symbol was created because the Catholic church prohibited autopsies until the 16th century—no one knew what a heart looked like.

The earliest known visual depiction of a heart symbol, as a lover hands his heart to the beloved lady, in a manuscript of the Roman de la poire, which dates to around 1250 (see below).


The use of a heart shape in a logo to signify love was popularized by graphic designer Milton Glaser in his 1977 I [heart] New York poster and T-shirt campaign.


According to the two billion-word Oxford English Corpus, the adjective most often used to qualify the noun 'heart' is 'broken'.

NON-HUMAN HEARTS

Most mammals' hearts beat around one billion times in their lives. Species with shorter lifespans have faster pulse rates.

A blue whale's heart is the size of a Volkswagen Beetle and you could swim through some of its arteries.

The heart of a blue whale weighs about 1,500 lb

An octopus has three hearts, two to pump blood through the gills, one to pump it around the body..

Source Daily Express

Sunday, 21 June 2015

Hearing aid

The first mention of a hearing aid was made in 1588 by an Italian Giovanni Porta. In a book entitled Natural Magick, he described wooden aids shaped like animal ears.

The Carmelite friar Père Sébastien Truchet designed an early hearing aid, based on the curves of a parabola. His pioneering model was basically a long horn with a large pointed opening at one end.

An 18th-century drawing of ear trumpets

Electrical hearing aids were invented in 1901 by Miller Hutchinson. These first hearing aids weighed 16 lbs and had to be placed on the user's lap or on an adjacent table.

President Ronald Reagan revealed he wore hearing aids in 1983, leading to greater acceptance and increased sales of the devices among seniors. At the age of 72, he said that his hearing loss dated to his early Hollywood days when a .38-caliber blank was fired close to his right ear on a film set . 

Hearing

Dogs, cats, dolphins, bats, and mice can hear ultrasound.

The maximum upper range of human hearing is about 20 kHz, for dogs about 45 kHz, and for  cats, about 64 kHz.

Exposure to loud noises or music thins the protective coat of myelin around the auditory nerve, resulting in hearing loss.

The word "listen" has the same letters as the word "silent."

Hearing is the fastest human sense. A person can recognize a sound in as little as 0.05 seconds.

Because humans hear anywhere from 20 to 100 times faster than they see, everything that they perceive with their ears colors every other perception they have, and every conscious thought they have. Sound gets in so fast that it modifies all the other input and sets the stage for it.

The right ear is more efficient for listening to speech, while the left ear is better at listening to music.

Saturday, 20 June 2015

Health (Hebrews)

Unlike the many magical and folk medical treatments used by the rest of the world in ancient times, the Hebrews used innovative health techniques given to them by God based on science.

In biblical times, the priests acted as doctors and much of the scriptural legislation dealt with maintaining good health. Of the 613 commandments in the Pentateuch, 213 were of a medical nature, which in the main stressed the importance of social hygiene and preventative medicine.

In the Book of Numbers we see that amongst the instructions given by God to Moses and the Hebrews was that if a woman was suspected of being unfaithful, she was to be taken to a priest and made to drink some impure water. If she was guilty, she was taken ill, if innocent she would have no harmful effects. The emotion of guilt would produce the illness.

In the Book of Deuteronomy we see the Hebrews were told to designate a place outside the camp, where they could relieve themselves. They were told to have as part of their equipment, something to dig with, and when they had finished they should dig a hole and cover up their excrement.

An innovative divine sanitary instruction included in the Book of Numbers ordained that if somebody was to touch a corpse he was considered unclean for seven days and would have to wash with water on the third and seventh days. The washing procedure thereby cleared the unclean person of germs and protected others from exposure to harmful bacteria.

In the Book of Leviticus we see a person with an infectious disease was instructed to wear torn clothes, let their hair go unkempt, cover the lower part of his face and cry out "unclean, unclean." They had to live alone away from anyone else, the first ever example of quarantine. The unusual rituals were to prevent others coming near and catching any contagious diseases for fear of starting an epidemic.

Even the Seventh Commandment "you shall not commit adultery" was God's way of preventing epidemics of sexually transmitted diseases. People with a series of sexual partners ran a high risk of catching such diseases, which they were likely to pass on to later sexual partners, including their spouses. 

Health care

In 1938 the New Zealand Social Security Act provided a pioneering state medical service. Stimulated by its success the British economist and civil servant William Beveridge published his report proposing a full welfare state for Britain.

World Health Day is held each year on April 7th to celebrate the founding of the World Health Organisation on that date in 1948. It's headquarters are in Geneva (see below).

By Yann Forget - Wikipedia Commons

The post war UK Labour government took heed of Beveridge's report and on July 5, 1948 they created a public funded healthcare system, the National Health Service as part of their new welfare state. The aim of the founders of the NHS was that the state should care for its citizens "from the cradle to the grave."

Aneurin Bevan (1897-1960). the Labour minister of health, was the architect of the UK National Health Service. He resigned in 1951 in protest at the introduction of prescription charges for dental care and spectacles.

Leaflet concerning the launch of the NHS in England and Wales.

President Lyndon B. Johnson signed Medicare, a health insurance program for elderly Americans, into law on July 30, 1965.

The bill-signing ceremony took place at the Truman Library in Independence, Missouri. Former President Harry S. Truman was enrolled as Medicare's first beneficiary and received the first Medicare card. Johnson wanted to recognize Truman, who, in 1945, had become the first president to propose national health insurance, an initiative that was opposed by Congress at the time.

 President Johnson signing the Medicare amendment. Also Harry S. Truman (seated) and his wife, Bess, are on the far right

Medicaid, a state and federally funded program that offers health coverage to certain low-income people, was also signed into law by President Johnson on July 30, 1965, as an amendment to the Social Security Act.

The National Health Service in England and Wales employs 1.5 million people – nearly 5 per cent of the working population. It is the world's fifth largest employer after the US Defence Department, the Chinese army, Walmart and McDonald's.

An American baseball player only needs to spend one day in the major leagues to earn free healthcare for life.

Over 95% of the world’s population has health problems, with over a third having more than five ailments.