Heart Attack

Heart Attack

What is a Heart Attack?

A heart attack (also called AMI or acute myocardial infarction) happens when the arteries leading to the heart become blocked and the blood supply is slowed or stopped. When the heart muscle can’t get the oxygen it needs, the part of the heart tissue that is affected may die.

The symptoms of a heart attack can include:

  • Chest pain (often described as a crushing, squeezing or burning pain in the center of the chest and may radiate to your arm or jaw)
  • Shortness of breath
  • Dizziness or faintness
  • Sweating
  • Nausea
  • Cold or clammy skin
  • A gray or very ill appearance

Sometimes there may be no symptoms, especially if you have diabetes. Women sometimes have different symptoms, such as a different kind of chest pain and/or abdominal pain.

For more information about heart health go to:


Heart Attack Patient Mortality (Death)

This score tells you about the percent (rate) of heart attack patients that died within 30 days of going into the hospital.

This information is important because one way to tell if a hospital is doing a good job is to see if the death (mortality) rate for heart attack patients treated at that hospital is better than, the same as or worse than the U.S. national average. The death rates take into account how sick patients were before they were admitted to the hospital.

Lower numbers are better.

How is Mercy Hospital doing with heart attack patient deaths?

July 2020 – June 2023
Mercy Hospital 12.4%
U.S. national average 12.6%
  • The difference between Mercy Hospital and the national average is not significant.
  • Only regular Medicare patients are included. People in Medicare Advantage (managed care plans) and people who do not have Medicare are not included.
  • Learn More.

Heart Attack Patient Hospital Readmission

This score tells you about the percent (rate) of hospitalized heart attack patients who go back into a hospital again within 30 days after going home. Patients may have been readmitted back to the same hospital or to a different hospital. They may have been readmitted for heart attack-related care or for a different reason.

This information is important because one way to tell if a hospital is doing a good job is to see if the readmission rate for heart attack patients is better than, the same as or worse than the U.S. national average. The readmission rates take into account how sick patients were before they were admitted to the hospital.

Lower numbers are better.

How is Mercy Hospital doing with heart attack patient hospital readmission?

July 2020 – June 2023
Mercy Hospital 12.2%
U.S. national average 13.7%
  • The difference between Mercy Hospital and the national average is not significant.
  • Only regular Medicare patients are included. People in Medicare Advantage (managed care plans) and people who do not have Medicare are not included.

Keep in mind that you should not choose a hospital based solely on reported data.

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Updated: July 2024

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