Skip to content
My WebMD Sign In, Sign Up

Heart Disease Health Center

Font Size

Shocking Heart Deaths: Why They Happen

Sudden cardiac arrest isn't the same as a heart attack.
By
WebMD Feature

Someone in the prime of their life -- a professional sports star, teen athlete, marathon runner, or other seemingly healthy person -- isn't supposed to collapse and die from heart disease. But it occasionally happens, making sudden cardiac arrest front-page news.

The rare nature of sudden cardiac arrest among the young is precisely what makes it so attention-grabbing. According to the Cleveland Clinic, sudden cardiac death kills 1 in 100,000 to 1 in 300,000 athletes under age 35, more often males.

Recommended Related to Heart Disease

WebMD the Magazine's My Story: Cardiac Recovery

I had no inkling I had heart disease until December 2005, when I had two minor episodes of mild angina (pain in the chest area). My primary care physician ran an electrocardiogram but saw nothing abnormal. I was an athletic, lean 53-year-old who ate nutritious foods. He decided I was just stressed and gave me the go-ahead to go to Nicaragua on vacation. But while there, the angina went from mild to severe. The pain would come and go, but on three separate occasions the pain was the most massive...

Read the WebMD the Magazine's My Story: Cardiac Recovery article > >

Among the most publicized cases: U.S. Olympic volleyball player Flo Hyman in 1986; college basketball player Hank Gathers in 1990; and professional basketball players Pete Maravich in 1988 and Reggie Lewis in 1993.

People wonder if anything could have been done to prevent such an event. They wonder who's at risk, and whether anyone can survive sudden cardiac arrest.

Fortunately, the answer is yes, says Christine E. Lawless, MD, MBA, a cardiologist and sports medicine doctor in Chicago. She is the co-chair of the American College of Cardiology's sports and exercise council, and a consulting cardiologist for Major League Soccer.

"We're trying to get folks to recognize that the person can come back from [cardiac] arrest if you get there within a minute," Lawless says. With immediate use of an automated external defibrillator, people have a chance to live.

What Is Sudden Cardiac Arrest?

When you hear about a young person dropping dead, you may think "heart attack." But sudden cardiac arrest (also referred to as sudden cardiac death) is different.

A heart attack stems from a circulation, or "plumbing," problem of the heart, according to the Sudden Cardiac Arrest Association. It happens when a sudden blockage in a coronary artery severely reduces or cuts off blood flow to the heart, damaging heart muscle.

In contrast, a sudden cardiac arrest is due to an "electrical" problem in the heart. It happens when electrical signals that control the heart's pumping ability essentially short-circuit. Suddenly, the heart may beat dangerously fast, causing the heart's ventricles -- its main pumping chambers -- to quiver or flutter instead of pumping blood in a coordinated fashion. This rhythm disturbance, called ventricular fibrillation, "occurs in response to an underlying heart condition that may or may not have been detected," Lawless says.

Ventricular fibrillation disrupts the heart's pumping action, stopping blood flow to the rest of the body. A person in sudden cardiac arrest will collapse suddenly and lose consciousness, with no pulse or breathing.

Without immediate CPR or a shock from an automated defibrillator, the person usually dies within minutes -- that's why it's called "sudden cardiac death."

There is a connection between heart attack and sudden cardiac death, however. A heart attack can trigger an electrical malfunction that can lead to sudden cardiac arrest.

Today on WebMD

cholesterol lab test report
Article
Compressed heart
Article
 
heart rate graph
Article
Compressed heart
Article
 
empty football helmet
Article
Heart Valve
Video
 
eating blueberries
Article
Simple Steps to Lower Cholesterol
Slideshow
 
Inside A Heart Attack
SLIDESHOW
Omega 3 Sources
SLIDESHOW
 
Salt Shockers
SLIDESHOW
lowering blood pressure
SLIDESHOW