Stories about: congenital heart disease

3-D printed hearts of hope

Jason Ayres Patrick and Emani cropped
Jason Ayres with son Patrick, Dr. Emani, and Patrick’s 3-D printed heart

Jason Ayres, a family doctor in Alabama, was speechless as he held his adopted son Patrick’s heart in his hands. Well, a replica of his son’s heart — an exact replica, 3-D printed before the 3-year-old boy had lifesaving open-heart surgery.

Patrick was one of the first beneficiaries of 3-D printing technology at Boston Children’s Hospital, which last year helped open a new frontier in pediatric cardiac surgery. Patrick was born with numerous cardiac problems; in addition to double outlet right ventricle and a complete atrioventricular canal defect, his heart lay backwards in his chest.

“We knew early on that he’d need complex surgery to survive,” says Jason.

Finely detailed models of Patrick’s heart gave surgeon Sitaram Emani, MD, at the Boston Children’s Heart Center an up-close-and-personal look at his complex cardiac anatomy.

Read Full Story | Leave a Comment

Genetic factors linked with neurodevelopmental delays in children with congenital heart disease

brain geneticsAs survival has improved dramatically for children with even the most serious forms of heart disease, neurodevelopmental disabilities have been increasingly recognized. These can affect not only school performance, but also future employment, quality of life and social relationships.

“We’ve known for a while that children with congenital heart disease (CHD) have a higher risk of developmental delays,” says Amy Roberts, MD, a genetic cardiologist at the Boston Children’s Hospital Heart Center. “There are multiple hypotheses as to why that might be, and they’re not mutually exclusive.”

The side effects of surgery, such as oxygen deprivation during bypass, are commonly thought to be to blame. Others suspect problems with the in utero environment. But these factors are not the whole story.

“Even in studies that have measured every known risk factor, only one third of neurodevelopmental disabilities in children with CHD can be explained by factors related to the child’s heart disease, medical history or family factors,” notes Jane Newburger, MD, MPH, director of the Cardiac Neurodevelopment Program at Boston Children’s.

Perhaps there is a genetic component?

In a recent study published in Science, a team of researchers from seven hospitals (Boston Children’s, Brigham and Women’s Hospital, Children’s Hospital of Philadelphia, Columbia, Mount Sinai, Yale and University of California Los Angeles), examined the whole genomes of 1,213 patients with complex CHD, looking for genetic indicators that a child will have developmental delays alongside his or her CHD.

Read Full Story | Leave a Comment

First six months of life are best for stimulating child heart growth

heart-regeneration-study2
In these sample sections of mouse heart, the color blue signifies scar tissue. Damage from scarring was minimized by early administration of the drug neuregulin.

Developing a child-centric approach to treating heart failure is no easy task. For one thing, the underlying causes of decreased cardiac function in children vastly differ from those in adults. While most adults with heart failure have suffered a heart attack, heart failure in children is more likely the result of congenital heart disease (CHD), or a structural defect present at birth that impairs heart function. And most therapies designed for adults haven’t proven equally effective in children.

Stimulating heart muscle cells to regenerate is one way cardiac researchers at Boston Children’s Hospital’s Translational Research Center hope to restore function to children’s ailing hearts. In this area, children actually have an advantage over adults: their young heart cells are better suited for regrowth.

Reporting in the April 1 Science Translational Medicine, Brian Polizzotti, PhD, and Bernhard Kuhn, MD, demonstrate that not only does the drug neuregulin trigger heart cell regeneration and improve overall heart function in newborn mice, but its effects are most potent for humans within the first six months of life.

Read Full Story | Leave a Comment

Pediatric hospitals challenged by new adult heart population

Adult and child-mikecogh-FlickrAdvances in medical care sometimes present challenges on the flipside. Case in point: Over the past three decades, progressive developments in pediatric cardiac care have allowed many babies born with congenital heart disease (CHD) to survive. And longevity continues to improve. This progress, however, has brought hospitals a burgeoning patient population with tremendously complex and varied disease states.

About 90 percent of children born with heart defects now survive to adulthood, thanks to diagnostic, interventional and critical care improvements. Specifically, one-year survival has improved from 67.4 percent from 1979 to 1993, to 82.5 percent from 1994 to 2005.

“The number of pediatric hospital admissions for congenital heart disease is increasing relatively slowly, but as the patients live longer and develop common adult medical issues, adult patient admissions are increasing much more rapidly,” says Alexander Opotowsky, MD, MPH, cardiologist at the Boston Adult Congenital Heart (BACH) and Pulmonary Hypertension services at Boston Children’s Hospital.

Read Full Story | Leave a Comment

Defying orders to make heart surgery history

Lorraine Sweeney in 1963, on the 25th anniversary of her historic heart operation. (Children's Hospital Boston Archives)

When the first fetal cardiac surgery was performed at Children’s Hospital Boston in 2001 – entering Jack Miller’s heart through his mother’s abdomen and opening blood flow – the world was stunned. But more than 60 years earlier, another operation was equally game-changing.

It was 1938, a time before heart-lung bypass, when ether and chloroform were only starting to be supplanted by more controllable anesthetics, when tinkering with the heart or even opening the chest were seen as dangerous and taboo.

Tinkering was what Robert E. Gross, chief surgical resident at The Children’s Hospital, liked to do. He was interested in a congenital heart condition known as patent ductus arteriosus, a passageway between the pulmonary artery and the aorta that’s supposed to close after birth — but doesn’t.

Read Full Story | 3 Comments | Leave a Comment