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More hospitalized kids surviving cardiac arrest

Saturday December 22, 2012
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Hospitalized children who suffer cardiac arrest are nearly three times more likely to survive than they were about a decade ago, and no more likely to suffer brain impairment, according to a study.

Researchers analyzed the cases of 1,031 children who suffered cardiac arrest at 12 urban U.S. teaching hospitals from 2000 to 2009. The hospitals participate in the American Heart Associationís Get With the Guidelines-Resuscitation program, a quality-improvement effort that promotes consistent application of the latest scientific guidance for resuscitation.

In 2009, 43.4% of children studied survived until they were released from the hospital, compared with 14.3% in 2000. Among surviving children, the risk of brain impairment has remained unchanged during this period.

"Survival in children who experience a cardiac arrest in the hospital has increased nearly threefold during the past decade, and most of those who survive are without severe neurological disability," Saket Girotra, MD, the studyís lead author and an interventional cardiologist at the University of Iowa Hospitals & Clinics in Iowa City, said in a news release.

Most children who suffer in-hospital cardiac arrests already are critically ill, Girotra said. These children typically have respiratory illnesses such as pneumonia or severe infections, or have had heart surgery or are receiving care for conditions such as heart failure.

At the time of their cardiac arrest, almost 85% of the children in the study had "non-shockable" initial heart rhythms such as systole or pulseless electrical activity. Survival rates are lower in this group than for children with "shockable" rhythms such as pulseless ventricular tachycardia or ventricular fibrillation, which more often are linked to underlying heart disease.

Over the course of the study, the proportion of children with cardiac arrest from pulseless electrical activity increased substantially, perhaps because of an increase in acute illnesses that were not heart-related, Girotra said. "What was striking was that, despite this trend, survival still improved," Girotra said. Survival rates improved across age groups, gender and initial cardiac rhythm.

The researchers also explored whether better survival was because of better care during the resuscitation phase or during the post-resuscitation phase. Although improvements were noted in both phases, the largest gains stemmed primarily from better care during the resuscitation phase, with survival rates during that window rising from 42.9% in 2000 to 81.2% in 2009.

Although the study could not determine specifically what fueled the survival gains, Girotra said the improvement was probably due to a combination of factors, a number of which have been emphasized by the American Heart Association and other professional groups.

These include early recognition of cardiac arrest with the use of monitoring systems, high-quality chest compressions, timely defibrillation in patients with shockable heart rhythms, appropriate use of medicines during cardiac arrest and optimal care for resuscitated patients. The findings, Girotra said, underscore the importance of continuing efforts to improve the quality of resuscitation.

Because of their participation in the Get With the Guidelines-Resuscitation program, hospitals in the study may differ from other hospitals in important ways, Girotra said, such as additional resources and commitment to quality improvement, which may have accounted for the dramatic survival gains. "Our results may not reflect performance at non-participating hospitals," he said.

The study appeared Dec. 18 on the website of Circulation: Cardiovascular Quality & Outcomes, an American Heart Association journal. A PDF of the study is available at http://circoutcomes.ahajournals.org/content/early/2012/12/18/CIRCOUTCOMES.112.967968.abstract.

For more on the Get With the Guidelines-Resuscitation program, visit http://bit.ly/l6quLP.


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