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To Teach To Heal To Discover


We don't often think of heart disease relating to children, but in the U.S., eight of every 1,000 children born have congenital heart defects. That's 32,000 children each year. At the Steele Center, our pediatric cardiologists are taking care of these children's hearts and conducting research to find new and better ways to care for them.

Scott Klewer, MD is working to understand the development of the human heart, to understand at what point the heart can begin to develop abnormally. Of particular concern are babies who are born with Down syndrome as nearly half of these babies also are born with significant heart defects. "This research may pave the way to develop techniques to rescue developing hearts, but that's a long way off," says Dr. Klewer.

Can we change how a heart beats? That's the research question being explored by Ricardo Samson, MD. Children who have slow or irregular heartbeats often require a pacemaker. It's possible that a better understanding of what regulates the heartbeat would allow pediatric cardiologists to correct an abnormal heart rate with gene therapy. Dr. Samson is studying the calcium channels, which are the pores by which calcium enters the heart and regulate how much calcium goes in. This, in turn, regulates how hard the heart beats. Researchers believe that the calcium channels are related to the heart's ability to beat spontaneously. If this is so, it's possible that some time in the future, physicians could transfer the calcium channel gene to a heart that doesn't beat properly and restore normal heart function.


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UA College of Medicine : Arizona Health Sciences Center : The University of Arizona

Steele Children's Research Center
1501 N. Campbell Avenue, Suite 3301
PO Box 245073
Tucson, Arizona 85724
Phone: (520) 626-2221

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