Aortic Balloon Procedure Tested for Cardiac Arrest
Emergency medical teams used a minimally invasive balloon technique in a recent feasibility study to temporarily redirect blood flow toward the heart and brain during out-of-hospital cardiac arrest. Medical Xpress reported that the preliminary science was presented on November 7, 2026, at the American Heart Association’s Resuscitation Science Symposium in Chicago.
Out-of-hospital cardiac arrest carries a survival rate of roughly 1 in 10. For patients whose hearts fail to restart despite prolonged cardiopulmonary resuscitation, automated external defibrillators, and medications, treatment options remain severely limited. Survival rates have not meaningfully increased over the past fifty years.
Physicians deploy REBOA during standard CPR
During standard CPR, only a fraction of normal blood flow reaches vital organs. Death typically occurs because the heart remains stopped or the brain is deprived of oxygenated blood. To combat this, researchers adapted a trauma procedure known as Resuscitative Endovascular Balloon Occlusion of the Aorta, or REBOA.
Physicians with the East Anglian Air Ambulance helicopter emergency medical service deployed the technique at roadside locations and patient homes in eastern England between June 2024 and June 2026. When standard advanced cardiac life support failed, clinicians inserted a small balloon through an artery in the groin and inflated it inside the upper aorta above the diaphragm.
The procedure successfully blocked the upper aorta in 33 of 36 attempted patients. The intervention took about seven minutes from start to finish, with a median time from cardiac arrest to balloon inflation of 51 minutes, according to the study data.
Blood pressure and carbon dioxide levels increase after intervention
The intervention produced immediate physiological changes in the patients. Medical Xpress noted that aortic diastolic blood pressure increased by 59% on average, rising from 26 to 42 mm Hg and peaking at a 118% increase to 58 mm Hg. Average systolic blood pressure rose 20% from 76 to 91 mm Hg.
Exhaled carbon dioxide levels increased by 50%. Researchers noted no serious adverse effects related to the procedures. James Price, consultant emergency physician at Cambridge University Hospitals NHS Foundation Trust and lead author of the study, expressed surprise at the magnitude of the physiological response given the late stage of intervention.
To still see substantial improvements in blood pressure after such a prolonged period of cardiac arrest is really encouraging,
Price said, as reported by Medical Xpress.
Patients show encouraging indicators despite trial design
While the feasibility trial was not designed to measure long-term survival, researchers observed encouraging indicators among specific patient groups. Among the 33 patients with confirmed occlusion, eight regained a sustained return of spontaneous circulation, and two survived to hospital discharge with good neurological outcomes.
Miragenews.com reported that in a subgroup of patients with witnessed cardiac arrest linked to ventricular fibrillation who received REBOA at a median of 44 minutes, four out of five regained a sustained pulse, and two survived with favorable neurological function.
Investigators emphasize that the study does not prove REBOA saves lives on its own. Future trials will require control groups and larger participant pools to determine which patient demographics benefit most and whether specially trained nonphysician emergency responders can perform the technique earlier in the resuscitation timeline.
Frequently Asked Questions About REBOA in Cardiac Arrest
What is REBOA and how does it work during cardiac arrest?
REBOA stands for Resuscitative Endovascular Balloon Occlusion of the Aorta. It involves threading a small balloon catheter through an artery in the groin up into the aorta and inflating it to block blood flow to the lower body, thereby redirecting more oxygenated blood to the heart and brain.
Who conducted this study and where did it take place?
The two-year feasibility study was conducted between June 2024 and June 2026 by the East Anglian Air Ambulance in the eastern region of England. It involved 39 adult patients experiencing out-of-hospital cardiac arrest who did not respond to standard advanced life support.
Did the study prove that REBOA improves long-term survival?
No. Researchers noted that the study was designed to test feasibility and physiological responses rather than clinical outcomes. While two patients survived to hospital discharge with good neurological recovery, larger controlled trials are required to establish a definitive survival benefit.