Is high-intensity training safe with first-degree AV block?

Question

Hi doctor,

I hope you are doing well.

I am reaching out for your advice regarding exercise. I have been diagnosed with a type 1 AV block, which was identified during a routine ECG with my GP. I have not experienced any symptoms related to this condition. Throughout my life, I have exercised regularly, and I am currently taking Pregabalin, which I understand can sometimes be associated with this condition.

My question is whether it is safe for me to incorporate VO₂ max training into my cardio routine. I currently engage in a significant amount of zone 2 cardio, but I have encountered information suggesting that high-intensity (VO₂ max) training may not be suitable for someone with a type 1 AV block.

I would greatly appreciate your advice on whether this type of training is appropriate for me.

Answer 1

Hello,

Welcome to icliniq.com.

I understand your concerns.

Type 1 AV (atrioventricular) block is often seen in healthy athletes and typically does not cause any harm. Usually, when the heart rate increases during exercise, this block disappears, and the heart rhythm returns to normal.

However, in some cases, the block may worsen. If this occurs, exercise may not be suitable.

I recommend getting an echocardiogram to check for any structural heart issues, as well as a treadmill ECG (electrocardiogram) to determine whether the block resolves or worsens with exercise. Additionally, you should have your TSH (thyroid-stimulating hormone) levels tested.

Once you have these reports, please share them here so I can provide further guidance.

In most instances, if you do not experience symptoms such as dizziness, blackouts, chest pain, or syncope while exercising, you can continue to exercise. Physical activity is beneficial not only for your heart but also for your overall body and mind.

Please also share any ECGs and other test results you’ve had. Additionally, let me know if there is any family history of cardiac issues, such as heart attack, angina, structural heart disease, or stroke, so that I can offer guidance considering the entire clinical context.

I hope this information is helpful. Please feel free to reach out with any further questions.

Take care and have a nice day.