ISLAMABAD  – People who spend more than 11 hours a day at work increase their chances of having a heart attack by 67 per cent, a study has found.A team from University College London looked at more than 7,000 civil servants over a period of 11 years and established how many hours they worked on an average a day.They also collected information, including the condition of their heart, from medical records and health checks. Over the period, 192 had suffered a heart attack, reports the journal Annals of Internal Medicine. The study found that those who worked more than 11 hours a day were 67 percent more likely to have a heart attack than those who had a ‘nine to five’ job, according to the Daily Mail.Said Mika Kivimäki, who led the study: “We have shown that working long days is associated with a remarkable increase in the risk of heart disease.” The researchers say their findings could potentially prevent thousands of heart attacks a year as they would help physicians get a better idea of how likely a patient was to have one.Patients already at high risk - by being obese or smoking, for example - could be encouraged to cut down on their working hours. Around 2.6 million in Britain alone have heart disease, in which the organ’s blood supply is blocked by the build-up of fatty deposits in the coronary arteries. It claims 101,000 lives every year in the country.Teens who read less likely to be depressedTeenagers who devote more time to reading books are far less likely to suffer from depression than their peers who listen to music. The study was one of the first to use an intensive “real-life” methodology, called ecological momentary assessment, to study behaviours in real time.The method helped researchers recognise this large association between exposure to music and depression, said Brian Primack, assistant professor of medicine and paediatrics at University of Pittsburgh School of Medicine, who led the study.The study involved 106 adolescents, 46 of whom were diagnosed with major depressive disorder, the journal Archives of Paediatric and Adolescent Medicine reports. Researchers called the participants as many as 60 times during five extended weekends over two months and asked them whether they were using any of six types of media: TV or movies, music, video games, Internet, magazines or newspapers, books.They found that young people who were exposed to the most music, compared to those who listened to music the least, were 8.3 times more likely to be depressed, according to a statement. However, compared to those with the least time exposed to books, those who read books the most were one-tenth as likely to be depressed. “It also is important that reading was associated with less likelihood of depression. This is worth emphasising because overall in the US, reading books is decreasing, while nearly all other forms of media use are increasing,” concluded Primack.Scientists grow human heart in labScientists are growing human hearts in lab which they believe could start beating within weeks, offering hope to millions of cardiac patients. The experiment is a major step towards the first ‘grow-your-own’ heart, and could pave the way for made-to-order livers, lungs or kidneys.The organs were created by removing muscle cells from donor organs (from dead bodies) to leave behind tough hearts of connective tissue. Researchers then injected stem cells which multiplied and grew around the structure, eventually turning into healthy heart cells, the Daily Mail reports. Doris Taylor, expert in regenerative medicine at the University of Minnesota, said: “The hearts are growing, and we hope they will show signs of beating within the next weeks.” “There are many hurdles to overcome to generate a fully functioning heart, but my prediction is that one day it may be possible to grow entire organs for transplant,” added Taylor.Patients given normal heart transplants must take drugs to suppress their immune systems for the rest of their lives. This can increase the risk of high blood pressure, kidney failure and diabetes. If new hearts could be made using a patient’s own stem cells, it is less likely these would be rejected. The lab-grown organs have been created using these types of cells - the body’s immature ‘master cells’ which have the ability to turn into different types of tissue. Taylor’s team has already created beating rat and pig hearts. Although they were too weak to be used in animals, the work was an important step towards tailor-made organs.However, the race to create a working heart faces many obstacles. One of the biggest is getting enough oxygen to the organ through a complex network of blood vessels. Scientists also need to ensure the heart cells beat in time.