Every year, 715,000 Americans have a heart attack, according to the Center for Disease Control. We know it’s no small problem nationwide—but did you know that people in certain cities have more heart attacks than others?

New research from Gallup’s Well Being Index has revealed the ten American cities where people suffer the most heart attacks. The cities, according to the analysis conducted by 24/7 Wall Street, are situated on both coasts and nearly every region of the country.

The urban center that had the most heart attacks was Huntington, West Virginia and Ashland, Kentucky, where nearly 9 percent of the adults surveyed had suffered from the condition. As a point of reference, the national average was about 4 percent.

So why do people in some areas suffer from more heart attacks? It all has to do with other, related health problems. “In general, residents living in metro areas with high rates of heart attacks also struggle more with chronic health problems like high blood pressure, obesity, and diabetes,” said Gallup.com Deputy Managing Editor Elizabeth Mendes.

Indeed, in Huntington and Ashland, more than 43 percent of the surveyed adults said they had high blood pressure, 38 percent were obese, 30 percent smoked, and only 46.5 percent said they exercised for 30 minutes at least three days in the previous week. Low income, which leads to diminished access to quality healthcare and healthy food, may also be a factor, Gallup noted.

The cities that suffered the most heart attacks were:

1. Huntington, West Virginia and Ashland, Kentucky

8.9 percent of surveyed adults had a heart attack

2. Davenport, Iowa, and Moline-Rock Island, Illinois

6.7 percent (tied for second)

3. Fort Smith, Arkansas

6.7 percent (tied for second)

4. Utica and Rome, New York

6.6 percent

5. Charleston, West Virginia

6.3 percent (tied for 5th highest)

6. Knoxville, Tennessee

6.3 percent (tied for 5th highest)

7. Olympia, Washington

6.3 percent (tied for 5th highest)

8. Cape Coral and Fort Myers, Florida

6.2 percent (tied for 8th highest)

9. Duluth, Minnesota

6.2 percent (tied for 8th highest)

10. Reading, Pennsylvania

6.0 percent

For more details on why each of these cities made the list, head over to 24/7 Wall Street.