Margaret Bell Fischer MD

Margaret Bell Fischer, MD, holds the tiny steel implantable loop recorder between her thumb and forefinger as she explains the many ways this wireless device, inserted under the skin in a brief, one-suture procedure, provides important clues for her patients.

Clues are pivotal for Dr. Fischer, a cardiac electrophysiologist who treats pediatric and adult cardiac patients and specializes in the relatively new and growing population of adults with congenital heart defects. “Thanks to improved interventions, more and more children born with heart defects are surviving into adulthood,” she says. We just are learning all the ways the conditions evolve. But since they were so small when their condition was discovered, the patients often don’t even know what their diagnosis was or how it was treated.