Mayo’s Wild Anti-Fainting Cure

Patient monitor displaying vital signs in a hospital room — Photo: Chaikom / Shutterstock

A heart procedure that targets faulty nerve signals instead of faulty heart tissue is helping patients stop fainting for good.

Quick Take

Mayo Clinic doctors detail their growing experience with cardioneural ablation, a procedure for recurrent fainting and slow heart rhythms tied to an overactive vagus nerve.
Dr. Guru Kowlgi, a board-certified electrophysiologist, has become a leading voice on the procedure through Mayo Clinic podcasts and patient case studies.
The treatment burns away nerve clusters near the heart instead of heart muscle itself, separating it from standard ablation for irregular heartbeats.
Independent medical research backs up strong short-term results but says larger, longer studies are still needed before it becomes a standard guideline treatment.

What Cardioneural Ablation Actually Does

Cardioneural ablation, also called cardioneuroablation, targets small nerve clusters called ganglionated plexi that sit on the outside of the heart. These clusters carry vagus nerve signals that can slow the heart down or trigger sudden drops in blood pressure. Doctors thread a catheter into the heart and burn these nerve clusters, aiming to stop the faulty signal before it causes a person to collapse.

Mayo Clinic Builds A Track Record

Mayo Clinic has walked through its own experience with the procedure in a series of physician podcasts hosted by Dr. Anthony Kashou. In one episode, Dr. Guru Kowlgi discussed how patient selection for cardioneural ablation has changed as the program matured, refining who benefits most from the operation. Kowlgi is a board-certified cardiologist who focuses on invasive cardiac electrophysiology and complex catheter ablations.

Mayo Clinic has also shared real patient outcomes to show how the procedure changes daily life. One woman, identified as Brenda, had suffered repeated fainting spells before Kowlgi recommended cardioneuroablation. The catheter procedure destroyed nerve tissue driving her symptoms, and she was able to return to an active lifestyle afterward. Case reports have also documented success in unusual triggers, including a patient whose fainting spells were set off simply by swallowing.

Widening The Cases Where It Works

Doctors are not limiting the procedure to classic fainting cases. Mayo Clinic researchers have also studied it as a possible option for certain atrial fibrillation patients, exploring whether calming these same nerve signals could help control irregular heart rhythms beyond simple syncope. Separate research has tested performing the ablation without fluoroscopy, the X-ray imaging typically used to guide catheters, in a series of 30 patients ranging in age from their late 20s to mid-50s.

Independent Research Backs The Approach, With Limits

Outside medical literature supports much of what Mayo Clinic reports. A widely cited review from Mayo Clinic’s own Dr. Fred Kusumoto found the evidence base is currently built on small observational studies plus one randomized controlled trial, and all of them showed a real drop in fainting episodes after the procedure. That is a genuinely strong signal, even though the sample sizes remain modest by the standards of major heart guidelines.

Other independent reviews reach similar conclusions. One systematic review found the procedure was linked to a high rate of freedom from fainting spells in patients with vasovagal syncope. Another paper recommended the procedure specifically for patients under 60 with severe, recurrent fainting that did not respond to standard treatments, while a broader analysis noted the treatment shows real benefit but still lacks the large, multicenter randomized trials needed for formal guideline inclusion.

That gap between promising results and formal guideline status is common in newer heart procedures. Regulators and specialty societies typically wait for results to be repeated across many hospitals, not just pioneering centers, before writing a treatment into official recommendations. Mayo Clinic’s steady publication of case results and refined selection criteria is exactly the kind of groundwork that tends to move a promising therapy toward that wider acceptance.

Why This Matters For Patients Right Now

For patients who have fainted repeatedly despite medication, lifestyle changes, or pacemakers, cardioneural ablation offers a real option worth discussing with a cardiologist. The procedure carries real risks like any catheter-based heart intervention, and it is not yet a guideline-standard first choice for every patient. Patients considering it should ask whether their symptoms and heart rhythm pattern match the profiles doctors have found respond best to this nerve-focused approach.