Cardiac arrest occurs when the heart unexpectedly stops beating, due to faulty electrical signaling that affects heart rate.
Of those cases, 18 occurred during sex and 15 immediately after sex. Previous studies have looked at sex and heart attacks, but those are caused by a clot suddenly restricting blood flow, and people usually have time to get to a hospital and be treated, said Dr. Sumeet Chugh, a cardiologist at Cedars-Sinai Heart Institute in Los Angeles. "But mostly I feel it's reassuring data".
But it can't give a more detailed risk analysis on how likely sex is to trigger a heart attack compared with resting or other activity without knowing how frequently these people were having sex.
This, they said, explains the low survival rates from those who collapse in bed.
The new findings are part of a 16-year study of heart risk factors involving about a million people living in and around Portland. Sudden cardiac arrest is, more often than not, fatal, and it requires immediate specialized attention in order for the worst outcome to be prevented.
Because of the poor outcome of cardiac arrest, many who consider themselves at risk may try to avoid certain activities, such as sex, believing that they render them more exposed.
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Other heart experts said they weren't surprised by the results.
Sexual activity was associated in fewer than 1% of the cases.
Even so, we should not worry too much. Later the scientist asked that whether sex can be called unsafe for the heart patients and the answer come as to be on hold. Well, the study concludes that there are rare chances that cardiac arrest can trigger someone during sexual intercourse.
Even though sudden cardiac arrest during sexual activity was witnessed by a partner, bystander CPR was performed in only one-third of the cases.
A senior author of the study tells that 10 percent or less then that had survived in case of cardiac arrest in the US.
"By now, there is recognition from a lot of research that if someone is around when you have your cardiac arrest and provides CPR while the ambulance is getting there, it can be potentially lifesaving", Chugh said.