All reported cases were based on emergency medical service reports containing detailed information regarding the cause of the cardiac arrest.
The researchers then identified which cases were connected to sex, which they classified as an event that occurred within an hour of the sex itself.
"I'm a little surprised at the really tiny number", said study senior researcher Dr. Sumeet Chugh, medical director of the Heart Rhythm Center at Cedars-Sinai Medical Center in Los Angeles.More news: Arab League To Meet On Iran at Saudi Request
Research presented at the American Heart Association's Scientific Sessions 2017 contradicts a TV and movie myth that having sex is a common trigger for myocardial infarction or cardiac arrest. The risk of that happening is very low, according to a new study.
Compared with others who had sudden cardiac arrest, people with an arrest associated with sexual intercourse were more likely to be male (94 percent). "Over the years, we've had a fair bit of data on physical activity and how it's related to sudden cardiac arrest, but no one had looked specifically at sexual activity".
Researchers from the Cedars-Sinai Medical Center Heart Institute analyzed data from OR and discovered only 0.7 percent of those who died from sudden cardiac arrest had undergone sexual activity up to an hour earlier.
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Sex resulting in death after a heart attack is a highly unlikely scenario, scientists have deduced.
During intimacy died from cardiac arrest 30 people, 15 of them felt unwell after sex.
Sudden cardiac arrest kills about 350,000 people every year in the United States. A 2011 study by researchers at Harvard found that sex is easier than working out on a treadmill - and the heart rates of the men in the study rarely rose above 130 beats a minute.
Almost 20 percent of the sex-related hearts attack patients survived, compared to just 12.9 percent of those whose heart attacks weren't linked to sex.More news: Latest Update of GST council meeting effects the rate of 177 goods
"This highlights the importance of continued efforts to educate the public on the importance of CPR, no matter the circumstance", Chugh said.