11/10/2025
When Kathy Johnson of Williston learned earlier this year that she would need heart surgery to unblock her left coronary artery, she wasn’t surprised.
Johnson, a 65-year-old mother of two and now three-time grandmother, has dealt with a lifetime’s worth of serious medical issues, diagnoses and treatments with a take-on-all-comers attitude, starting at age 13, when she was diagnosed with Stage 4 Hodgkins Lymphoma.
“By my friends I’m known as a warrior, and I wear that title proudly,” said Johnson. “I think it’s different for everybody. But for me, I don’t want to just give up or sit in the corner and be sad. I chose to live as best I can, as positively as I can.”
Beating Hodgkins Lymphoma in 1973 through a combination of chemotherapy, surgery and radiation therapy was just the first step in what would become a complex medical journey that includes surviving breast cancer, coronary artery disease and numerous major heart and abdominal surgeries. This time, however, the challenge facing Johnson was not just enduring another high-risk, time-sensitive, life-saving heart procedure. It was finding a way to make the surgery possible at all.
“When I first met Kathy, I didn’t know what we would be able to do to help her. Her anatomy made operative intervention prohibitive,” said Monica McDonald, MD, a cardio-thoracic surgeon who ultimately performed Johnson’s latest heart procedure in partnership with interventional cardiologists Jan Denkmann, MD, and Harold Dauerman, MD. “That was devastating. She’s a young lady who wanted to enjoy her life. I then called Dr. Dauerman to see if there was some way we could figure out a plan to help her do that.”
Ultimately, a team of surgeons and interventional cardiologists recommended a novel approach: Drs. McDonald, Denkmann and Dauerman would perform the procedure in the cardiac catheterization lab at University of Vermont Medical Center while using an advanced form of life support called Extracorporeal Membrane Oxygenation (ECMO).
ECMO is a form of temporary life support that acts as an artificial heart and lung for patients experiencing serious temporary cardiac and respiratory conditions. Blood is pumped outside of the body, where the machine removes carbon dioxide and then re-warms and sends oxygen-rich blood back to the body.
It was the first time the advanced life-support technology had been used in the hospital’s catheter lab.
“Kathy’s medical history is challenging and will help us pave the way forward and develop new heart team collaborations,” said Dr. Dauerman, director of interventional cardiology for University of Vermont Health. “Her case forced us to work as a team and come up with a creative solution. It really expands how the heart, anesthesia and perfusion teams use the latest technologies to treat our sickest patients.”
Launched earlier this year, ECMO is a form of temporary life support that acts as an artificial heart and lung for patients experiencing serious temporary cardiac and respiratory conditions. Blood is pumped outside of the body, where the machine removes carbon dioxide and then re-warms and sends oxygen-rich blood back to the body.
The program includes both VV ECMO, which is life-support for patients experiencing respiratory failure, and VA ECMO, which is life-support for both cardiac and respiratory failure.
ECMO allows a patient’s heart and lungs to rest and heal while maintaining blood flow and lung function and can be used in the treatment of patients with conditions ranging from severe flu or pneumonia, heart attack, pulmonary embolism, asthma, trauma, harmful effects caused by swallowing toxic substances and more – as well as life support during surgical procedures and interventions.
The hospital’s ECMO team includes physicians from emergency care, critical care, and cardiology, as well as specialized nurses, perfusionists – who work with physicians to protect patients’ health during surgery and other medical procedures – respiratory therapists, and physical/occupational therapists.
Elizabeth Pocock, MD, a cardiothoracic surgeon and lead of the hospital’s ECMO program said the team’s multi-disciplinary approach reflects the system’s potential to be used to support patients with a wide variety of critical needs.
“This can help so many providers take care of their patients,” said Dr. Pocock. “And it has the potential to help patients recover from a serious traumatic event or life-threatening condition more quickly and help them avoid potential complications from long hospital stays or being bedridden for an extended period of time.”
The Robert Larner, M.D. College of Medicine at The University of Vermont
