People who have heart attacks in the United States are far more likely to be readmitted to the hospital within 30 days than people in 16 other countries, a recent study indicates.

Researchers suspect that the average length of stay in the hospital, which was just three days in the United States compared with at least six days in other countries, is the main reason for the higher readmission rates. When they completed an analysis that adjusted the data for length of stay, they found that location was no longer a predictor of readmission.

"We found two striking predictors of 30-day readmission. Having multi-vessel disease (more than one coronary artery is blocked) and being in the US. This difference is probably multifactorial, but the length of stay is the shortest in the US. It was three days here and six, seven or more in other countries," said study senior author Manesh Patel, MD, an assistant professor of medicine in the division of cardiology at Duke University in Durham, North Carolina.

"When we adjusted for the length of stay, the difference went away. We're really good at opening up their arteries, but our systems of care may not be as integrated as they are in other countries. We need to make the link from the hospital to the primary care doctor to ensure that patients are getting set up in cardiac rehab and that they're following up with a cardiologist," Dr. Patel said.

And, while the study found that US patients had higher readmission rates after a heart attack, Dr. Patel noted that mortality rates weren't higher in the United States.

Study Details

The study looked at people who were hospitalized for a specific type of heart attack called an ST-segment elevation myocardial infarction (STEMD. This type of heart attack accounts for up to 38% of all heart attacks, according to background information in the article, and the coronary artery is completely blocked by a clot in these cases.

The study included 5,745 people from 296 hospitals in 17 countries who were admitted for a STEMI. Most of the patients (571) survived to be discharged from the hospital. Of those, 11.3% of patients overall ended up being readmitted within 30 days.

Thirty-day readmission rates in the United States were 14.5%, but just 99% in the other countries in the study. The average length of stay was three days in the United States compared with eight days in Germany, the country with the longest average length of stay.

People who had multivessel disease were almost twice as likely to be readmitted to the hospital within 30 days, according to the study.

The other significant predictor of readmission within 30 days was being in the United States. After excluding people returning to the hospital to have additional elective procedures, people admitted in the United States had a 53% greater chance of being readmitted within 30 days versus people in other countries.

After adjusting the data to account for differences in the patients, such as age and underlying health conditions, the researchers found a 14.4% readmission rate in the United States versus a 9.3% rate for all of the other countries. Italy had the lowest readmission rates at 4.4%, followed closely by Germany at 4.8%. Canada had a 5.6% adjusted readmission rate, according to the study

Results of the study are published in the fournal of the American Medical Association.


"This study compared the US against 16 other countries and asked how do we (the US) measure up? And, their findings were a little disturbing. About 60% of patients with major heart attacks were discharged in three days or less. And, our readmission rates were higher than in other countries. We have the technology and the ability to provide quality care, but we're just not doing well. Even for the sickest patients, we're not doing well," said Suzanne Steinbaum, DO, a preventive cardiologist at Lenox Hill Hospital in New York City, and a spokesperson for the American Heart Association.

"We're not sure that staying in the hospital longer would keep you from being readmitted. We know we provide good initial care. But, how well is that care transferred from the hospital to the home? We have to make sure patients know how they need to follow up," Dr. Patel said.

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