An "Emergency" sign is shown.Many rural residents with severe heart attacks drive or are driven to the hospital, but they have a better chance of survival if they call 911, a new study finds.

Researchers looked at 774 people in rural Minnesota, North Dakota and South Dakota who suffered a severe type of heart attack in 2013 and 2014. Fifty-two percent of them arrived at the hospital in their own vehicles, rather than calling 911.

The average time it took to get to the hospital was 38 minutes for patients who traveled in their own vehicles and 26 minutes for those brought by ambulance.

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“There’s a reason we tell patients ‘Survive don’t drive,'” noted Denise Busman, MSN, RN.

Busman is the manager of clinical practice, education and quality at the Spectrum Health Frederick Meijer Heart and Vascular Institute.

She said when it comes to symptoms of a heart attack, calling 911 is your best bet.

“EMS medics can often determine that a heart attack is occurring on the way to the hospital so the cardiac team is waiting for you when you arrive,” Busman said. “We know time is muscle and that for every 30-minute delay in treating a heart attack, the likelihood of dying goes up by about 7.5 percent. Arriving by EMS when you’re having a heart attack cuts the time spent in the emergency department in half and lowered the overall time it takes to treat your heart attack by 20 minutes.”

That’s right, 20 minutes. The cardiology professionals at Spectrum Health have worked with emergency teams to create an efficient, synergistic system of care aimed at improving outcomes for heart patients in West Michigan.

The average time it took from arriving at the hospital to receiving heart artery-opening treatment was 57 minutes for those who traveled in their own vehicles and 42 minutes for those who arrived by ambulance.

The study was published in the American Heart Association (AHA) journal Circulation: Cardiovascular Quality and Outcomes.

“The biggest implication is raising awareness so the public understands the vital role of EMS (emergency medical services) in health care,” study author Dr. John Gallagher, EMS Medical Director of the Winona Area Ambulance Service in Minnesota, said in an AHA news release.

“EMS continues to be viewed as only a ‘ride,’ but utilizing EMS as part of the health care system not only allows for treatment from the time they arrive at your door, but also has been proven to shorten time to (heart attack) treatment faster,” he added.

The researchers did not look at why heart attack patients drove their own vehicles to the hospital instead of calling 911.

“The public needs to start seeing EMS as the first access point to health care. Their unique capabilities to deliver lifesaving care en route to the hospital should not be underestimated. The benefits of 20 minutes saved in their heart attack timeline are huge,” Gallagher said.