Cardiac Arrest: Many People Experience Warning Signs the Day Before

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By Denise Mann HealthDay Reporter>

WEDNESDAY, Aug. 30, 2023 — Sudden cardiac arrest may not come on so suddenly after all.

Fully 50% of people who experienced a sudden cardiac arrest had a telling symptom 24 hours before, and these symptoms are different in men than women, a new study suggests. For women, the most prominent symptom of an impending sudden cardiac arrest is shortness of breath; for men, it is chest pain and pressure.

“Yes, warning symptoms are associated with cardiac arrest, and these symptoms are sex-specific,” said study author Dr. Sumeet Chugh. He is the chair in cardiac electrophysiology research and medical director of the Heart Rhythm Center in the department of cardiology at the Smidt Heart Institute of Cedars-Sinai in Los Angeles.

It’s been thought that cardiac arrest comes on without warning, which is why the overwhelming majority of people who experience it outside of a hospital die within minutes, but that may not be the case and identifying any warning signs can give folks a fighting chance, Chugh said.

Typically caused by heart rhythm abnormalities, cardiac arrest occurs when the heart stops pumping. When this happens, blood stops flowing to the brain and other organs. Every year, as many as 450,000 Americans die from cardiac arrest, according to the U.S. National Heart, Lung, and Blood Institute.

When the researchers reviewed data from two community-based studies of people who experienced sudden cardiac arrest and compared their symptoms to those in people who sought emergency care but didn’t experience cardiac arrest, they found that 50% of people who had a sudden cardiac arrest experienced at least one telltale symptom the day before, namely chest pain in men and shortness of breath in women.

What’s more, smaller groups of men and women experienced palpitations, seizure-like activity and flu-like symptoms before they suffered cardiac arrest. One study took place in Ventura, Calif., and the other took place in Portland, Ore. And both yielded similar results.

Still, Chugh cautioned that chest pain and shortness of breath can occur for other reasons and don’t necessarily mean a person is on the verge of cardiac arrest. However, when these occur in someone who also has high blood pressure, diabetes or underlying heart disease, they are more likely to be associated with cardiac arrest. In the future, apps or smart watches may further narrow down who is most at risk for sudden cardiac arrest, he said.

“We have to combine other features with warning symptoms to help people understand if they are likely experiencing a cardiac arrest and need help right away,” Chugh said.

If you experience an unexpected onset of chest pain or shortness of breath call 911, especially if you have known heart disease.

If you witness someone collapse, start CPR right away, he said. If CPR isn’t started within two to three minutes of cardiac arrest, brain injury can occur. Automated external defibrillators (AEDs) are also more readily available in many public places. These analyze the heart’s rhythm and, if necessary, deliver an electrical shock to re-establish an effective rhythm. Immediate CPR or AED use were among the reasons that Bronny James, the 18-year-old son of NBA player LeBron James, and Buffalo Bills football player Damar Hamlin, survived their cardiac arrests.

The new study was published online Aug. 26 in The Lancet Digital Health journal.

Heeding any warning signs of cardiac arrest may help save a person’s life, said Dr. Raman Mitra, director of the electrophysiology laboratory at North Shore University Hospital in Manhasset, N.Y.

“We think of sudden cardiac arrest as a person being perfectly fine and then collapsing, but there may be a way that we can identify these people earlier so that help can be alerted,” said Mitra, who had no ties to the new research. “If chest pain is new and associated with shortness of breath, heart palpitations, dizziness, passing out, sweating or nausea, seek medical attention.”

Sources

  • Sumeet Chugh, MD, Pauline and Harold Price Chair in Cardiac Electrophysiology Research, medical director, Heart Rhythm Center, department of cardiology, director, division, artificial intelligence in medicine, department, medicine, Smidt Heart Institute, Cedars Sinai, Los Angeles
  • Raman Mitra, MD, director, electrophysiology laboratory, North Shore University Hospital, Manhasset, N.Y.
  • The Lancet Digital Health, Aug 26, 2023, online

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