Heart Attack is one of the leading causes of death worldwide. Approximately 18 to 20 million people die each year globally. Luckily, scientists have developed a new method that promises to decrease the number of people dying from heart attacks.
What is a heart attack or Myocardial infarction?
A heart attack is also called a myocardial infarction.
Anyone can face a heart attack, but those aged over 45, with a family history, and certain countable factors like smoking, poor diet, lack of exercise, high blood pressure, obesity, disabilities, high stress, and substance use, are at high risk of having heart attacks.
A heart attack occurs when an artery that sends blood and oxygen (O2) is blocked due to plaque and/or a clot. The plaques occurred over time when fatty, cholesterol-containing deposits built up in the heart’s arteries. If a plaque ruptures, a blood clot can form. The clot can block arteries, causing a heart attack. During a heart attack, a lack of blood flow causes the tissue in the heart muscle to die and not function eventually.
We all should know that prompt treatment is needed in case a heart attack happens in order to prevent death. Calling an emergency medical health is vital if you think you might be having a heart attack.
Symptoms
In the case of a heart attack, symptoms can be different from person to person who faces it. Some people have mild symptoms. Others have devastating ones. Some people have no symptoms.
Common heart attack symptoms include:
- Cold Sweat
- Fatigue
- chest pain that may feel like pressure, tightness, pain, squeezing, or aching
- Pain or discomfort that spreads to the shoulder, arm, back, neck, jaw, teeth, or the upper belly
- heartburn or indigestion
- nausea
- shortness of breath
Women may have non-typical symptoms such as brief or sharp pain felt in the neck, arm, or back. Sometimes, the first symptom of a heart attack is sudden cardiac arrest.
Some heart attack cases strike suddenly. But many people have warning symptoms hours , days, or even weeks in advance. Chest pain or pressure (angina) that keeps happening and does not go away for a long period of time can be an early warning sign and symptom.
Angina is caused by a temporary decrease in blood flow to the heart.
In-depth Study
As it is said, oxygen-starved cells die and are replaced by scar tissue that cannot contract or conduct electrical signals, which weakens the heart’s ability to pump blood.
Dr. Zhu explains that the adult human heart does not regenerate once those cells are lost. That is why heart failure, heart attacks, and all these chronic heart failures due to the loss of functional cardiac muscle are often difficult to treat, as the muscle simply cannot repair itself.
Over decades, researchers and scientists have been working collaboratively all around the world on ways to replace damaged tissue with healthy heart cells derived from stem cells. Early findings showed promise, but most of them required open-heart surgery, which is a procedure too risky for many patients already struggling with severe heart failure.
Scientists have long hoped that stem cells could provide more effective treatment to rebuild what the body cannot. “By reprogramming ordinary adult cells such as skin or blood cells into induced pluripotent stem cells (iPSCs), researchers can coax them into becoming replacement heart cells”, Marla Broadfoot, Ph.D. writes in her article in Mayo Clinic News network.
However, the effective and safe delivery of these engineered heart tissues made from these cells remains a major challenge in this research.
Innovative Therapy: Patches that Repair Damaged Tissues
Mayo researchers, with the collaboration of engineers at the University of Nebraska Medical Center, developed a flexible, paper-thin patch made of nano and microfibers coated with gelatin. This hybrid scaffold supports a blend of human heart muscle cells, blood vessel cells, and fibroblasts.
Before transplantation, the tissue is induced with bioactive factors such as fibroblast growth factor 1 and CHIR99020 that encourage the growth of new blood vessels and help the cells survive once they are placed.
The senior author of the study, Dr. Zhu, says, “The beauty of this design is that it can be folded like a piece of paper, loaded into a slender tube, and delivered precisely where it is needed through a small incision in the chest. Once in place, it unfolds and adheres naturally to the heart’s surface.”
Scientists used a biocompatible surgical adhesive that holds the patch in place while minimizing additional trauma to the surrounding tissue. This kind of effect cannot be seen if stitching is used.
By testing in preclinical models, scientists have seen that minimally invasive methods improved heart function, reduced scarring, enhanced vascular growth, and lessened inflammation compared with conventional approaches.
Next steps
The Mayo Clinic team plans to advance this work further through larger-scale preclinical testing to ensure that it is safe and effective enough before making human clinical trials, a process that scientist estimates could take five or more years.
Worldwide, over 5,000 heart transplants are performed annually, with the U.S. and Western Europe leading in volume, while several thousand patients die waiting for a donor organ. The team of Dr. Zhu hopes this technology could eventually offer another option.
Dr. Zhu says that their vision is to offer patients engineering heart tissues made from their own reprogrammed cells, which are delivered through a minimally invasive procedure. No donors, no donor organs, no long recovery, just a repaired and healthy heart.
Final words
This study of Mayo Clinic and the University of Nebraska Medical Center is one of the clear pieces of evidence that the sphere of regenerative medicine has been developing and expanding its potential further.
While the road to human clinical trials requires patience and further testing, the implications of this breakthrough are profound. By moving away from the high-risk nature of open-heart surgery and the scarcity of donor organs, we are entering a new era of personalized cardiology. This ‘origami-like’ patch does more than just cover a wound; it bridges the gap between mechanical repair and biological rebirth. As we look toward a future where the heart can essentially be taught to heal itself, the dream of a world where a heart attack is no longer a permanent death sentence for cardiac tissue is finally within our reach.
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