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LOS ANGELES – All heart attacks are not the same – some of them are characterized by silence, which means that they can occur with atypical symptoms or have no symptoms. New research reveals a close link between these silent heart attacks and sudden death of the heart.
In other words, many people who died from sudden cardiac arrest may have had an undiagnosed or unconscious heart attack at some point in their lives.
A sudden cardiac arrest, not to be confused with a heart attack, refers to the sudden loss of heart function, breathing and consciousness, which most often results from an electrical disturbance of the heart that causes it to develop. Stop pumping blood to the rest of the body. Death can occur if it is not detected and reversed with a defibrillator within minutes of its occurrence.
According to the Heart Attack Foundation, sudden cardiac arrest is the third leading cause of death in the United States and affects approximately 356,000 people a year.
A team of researchers has begun to determine the prevalence of silent heart attacks, known as myocardial infarction (MI), in people who have suffered sudden cardiac death and have made a substantial connection between the two.
The results were published Wednesday in the journal JAMA Cardiology. Researchers from the Miller School of Medicine at the University of Miami School of Medicine and the University of Miami have compared autopsy results, clinical features and EKG markers related to the MCH of a group of 3,122 people suddenly died of cardiac arrest without prior diagnosis or knowledge of coronary artery disease.
The study population was extracted from an earlier Finnish study of arrhythmic events in a cohort of individuals with sudden cardiac death in northern Finland between 1998 and 2017.
Of a total of 4,392 people who suffered sudden cardiac death as a result of coronary artery disease, 3,122 of them had never been diagnosed with coronary artery disease.
They found that 42.4% of them, or 1,322 people, had scars during their autopsies, indicating that the SMI had already taken place.
In another study, which examined similar data for a cohort of Minneapolis individuals who suffered sudden cardiac death between 2001 and 2004, 34% of individuals had scars compatible with MCH at autopsy. These findings were published in the American Heart Journal in 2010.
Both studies highlight the need to improve the detection and treatment of coronary heart disease.
Identifying people at risk for sudden cardiac death has always been a challenge for healthcare professionals, but finding a way to accurately diagnose and treat SMI could lead to a significant reduction in heart disease deaths.
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