Can cold water control AFib at 34 through vagus stimulation?

Question

Hello doctor,

My father is 71 years old and was diagnosed with persistent atrial fibrillation four months ago. He has been started on Apixaban 5 mg twice daily and Bisoprolol 5mg once daily.

But he continues to experience distressing palpitations, significant breathlessness on minimal exertion, and repeated dizzy spells, with a resting heart rate remaining between 95 and 115 beats per minute on his current beta-blocker dose.

Does cold water help convert AFib back to normal at 34 through vagal nerve stimulation?
Are there any such non-pharmacologic vagal maneuvers that can be performed by an elderly 71-year-old patient who has borderline reduced ejection fraction of 42% in order to normalize sinus rhythm while experiencing palpitations?
Does the doctor think that he needs to optimize his current Bisoprolol dose, and whether there is a need for other rate-controlling drugs?

Kindly suggest.

Thank you.

Answer 1

Hello,

Welcome to icliniq.com.

I understand your concern.

Your father’s symptoms deserve prompt medical reassessment because persistent atrial fibrillation with ongoing breathlessness, dizziness, palpitations, and heart rates remaining around 95 to 115 beats per minute despite Bisoprolol may indicate that his rate control is not yet adequate.

In someone with a reduced ejection fraction of 42 percent, prolonged poorly controlled heart rates can sometimes worsen cardiac function over time and increase fatigue and shortness of breath.

The fact that he is already on Apixaban is important because it helps reduce stroke risk, but it does not control the rhythm or heart rate itself.

Cold water exposure and vagal maneuvers such as bearing down, coughing, or facial immersion in cold water can sometimes help terminate certain rapid heart rhythms like supraventricular tachycardia, but they are generally much less effective for established atrial fibrillation and should not be relied upon to restore sinus rhythm in a 71-year-old with structural heart disease and reduced heart function.

In some older patients, aggressive vagal maneuvers can also provoke dizziness or drops in blood pressure. Because he is symptomatic despite treatment, he should be reviewed soon by his physician or cardiologist to assess whether his Bisoprolol dose needs adjustment or whether additional therapies such as Digoxin, another rate-controlling strategy, rhythm control medications, cardioversion, or further cardiac evaluation are appropriate.

I hope you find this information helpful.

For more queries, feel free to reach out to me anytime.

Thank you.