Health and Me

Ishita Srivastava

Heart Cells Can Regrow After A Cardiac Arrest, Scientists Say

The human heart can grow new cells in damaged areas after suffering from a <span><a href="https://www.healthandme.com/health/heart-attack">heart attack</a></span>, an Australian <a href="https://www.ahajournals.org/doi/10.1161/CIRCRESAHA.125.327486" data-type="tilCustomLink" target="_blank" rel="noopener nofollow noreferrer" rel= "noopener nofollow noreferrer" target= "_blank">study </a> shows. 

Heart attacks occur when blood flow to the heart is severely reduced or blocked  due to a buildup of plaque which is made of fat, cholesterol and other substances in the heart's arteries.

During a heart attack, a lack of blood flow causes the cells and tissue in the heart muscle to die, leading to irreversible damage that can result in serious complications like arrhythmias, <span><a href="https://www.healthandme.com/health/heart-failure">heart failure</a></span>, cardiogenic shock, or cardiac arrest

 It is one of the leading causes of death in the country. Four Indians experience a heart attack every minute, with one in four dying of the cause. Experts have also noticed a rising trend of nearly 50 percent of heart attack patients being under the age of 40, with half of all heart attacks in Indian men occurring under 50.

However scientists in <span>Australia</span> have found that organ can regrow new cells to replace the damaged ones after an attack through increased mitosis. 

<h2>How Does The Heart Regrow Cells?</h2>

Until now, the phenomenon of new heart cells growing in scarred areas of the heart had only been seen in mice however, the team made a breakthrough using living heart tissue samples collected from human patients undergoing bypass surgery at Australia’s Royal Prince Alfred Hospital.

The study, published in <span>Circulation Research</span>, found that while sections of the heart remain that had been left scarred following a heart attack, new heart muscle cells were also being produced in the same area through mitosis. 

This process involves a parent cell dividing itself to create two genetically identical daughter cells, each with the same number of chromosomes as the parent for growth, repair and replacing old cells in humans.

<strong>READ MORE: </strong><a href="https://www.healthandme.com/fitness/the-4-minute-scandinavian-exercise-that-can-add-20-years-to-your-lifespan-article-153481299" data-type="tilCustomLink" target="_blank">The 4-Minute Scandinavian Exercise That Can Add 20 Years To Your Lifespan</a> 

<span>Robert Hume</span>, a research fellow at the <span>University of Sydney</span> and the study’s first author, said: "Until now we’ve thought that, because heart cells die after a heart attack, those areas of the heart were irreparably damaged, leaving the heart less able to pump blood to the body’s organs. 

"In time, we hope to develop therapies that can amplify the heart’s natural ability to produce new cells and regenerate the heart after an attack."

The scientists are yet to discover the exact mechanism between how cells regrow in scarred regions of the heart. 

<h2>Coronary Artery Disease: The Silent Killer</h2>

Coronary artery disease (<span>CAD</span>) is one of the most common illnesses that can cause a heart attack in people. It develops over years and has no clear signs and symptoms apart from a heart attack.

The illness begins due to a buildup of fats, cholesterol and other substances known as plaque in and on the artery walls.

Over time, this can cause narrowing or blockage of the coronary arteries and block the supply of oxygen-rich blood to heart which can lead chest pain (angina), shortness of breath and ultimately, heart attacks.

Typically, those above the age of 45, having a biological family member with heart disease, lack of sleep, smoking, consuming saturated fats along with other autoimmune diseases such as lupus and rheumatoid arthritis can increase the risk of developing CAD.

Nearly one in 10 Indian adults suffer from CAD and about two million people die from the disease annually. Apart from this, about 18 to 20 million American adults aged 20 and older are also affected about the disease.

Health Conditions A-Z

health

Heart Attack

robert hume

Heart Failure

university of sydney

circulation research

australia

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The human heart can grow new cells in damaged areas after suffering from a heart attack, an Australian study  shows. Heart attacks occur when blood flow to the heart is severely reduced or blocked  due to a buildup of plaque which is made of fat, cholesterol and other substances in the heart's arteries. During a heart attack, a lack of blood flow causes the cells and tissue in the heart muscle to die, leading to irreversible damage that can result in serious complications like arrhythmias, heart failure, cardiogenic shock, or cardiac arrest It is one of the leading causes of death in the country. Four Indians experience a heart attack every minute, with one in four dying of the cause. Experts have also noticed a rising trend of nearly 50 percent of heart attack patients being under the age of 40, with half of all heart attacks in Indian men occurring under 50.However scientists in Australia have found that organ can regrow new cells to replace the damaged ones after an attack through increased mitosis. How Does The Heart Regrow Cells?Until now, the phenomenon of new heart cells growing in scarred areas of the heart had only been seen in mice however, the team made a breakthrough using living heart tissue samples collected from human patients undergoing bypass surgery at Australia’s Royal Prince Alfred Hospital.The study, published in Circulation Research, found that while sections of the heart remain that had been left scarred following a heart attack, new heart muscle cells were also being produced in the same area through mitosis. This process involves a parent cell dividing itself to create two genetically identical daughter cells, each with the same number of chromosomes as the parent for growth, repair and replacing old cells in humans.READ MORE: The 4-Minute Scandinavian Exercise That Can Add 20 Years To Your Lifespan Robert Hume, a research fellow at the University of Sydney and the study’s first author, said: "Until now we’ve thought that, because heart cells die after a heart attack, those areas of the heart were irreparably damaged, leaving the heart less able to pump blood to the body’s organs. "In time, we hope to develop therapies that can amplify the heart’s natural ability to produce new cells and regenerate the heart after an attack."The scientists are yet to discover the exact mechanism between how cells regrow in scarred regions of the heart. Coronary Artery Disease: The Silent KillerCoronary artery disease (CAD) is one of the most common illnesses that can cause a heart attack in people. It develops over years and has no clear signs and symptoms apart from a heart attack.The illness begins due to a buildup of fats, cholesterol and other substances known as plaque in and on the artery walls.Over time, this can cause narrowing or blockage of the coronary arteries and block the supply of oxygen-rich blood to heart which can lead chest pain (angina), shortness of breath and ultimately, heart attacks.Typically, those above the age of 45, having a biological family member with heart disease, lack of sleep, smoking, consuming saturated fats along with other autoimmune diseases such as lupus and rheumatoid arthritis can increase the risk of developing CAD.Nearly one in 10 Indian adults suffer from CAD and about two million people die from the disease annually. Apart from this, about 18 to 20 million American adults aged 20 and older are also affected about the disease.