Cardiologist Questions Overactive Thyroid

Can an overactive thyroid increase risk of heart problems?

I have been diagnosed with an overactive thyroid. Will this increase my risks of a heart problem?

6 Answers

Untreated over-active thyroid can definitely lead to heart problems such as arrhythmia (where your heart rhythm is no longer normal), and congestive heart failure. There are very routine treatments for Hyperthyroidism and should be treated by a specialist.
Yes it can. An overactive thyroid can be associated with cardiac arhythmias including atrial fibrillation
Hyperthyroidism is associated with a higher incidence of arrhythmias. The commonest is a higher than normal resting heart rate (simply referred to as sinus tachycardia). However, it can also cause other atrial arrhythmias such as atrial fibrillation. A very high heart rate of left untreated could lead to what we refer to as a tachycardia mediated cardiomyopathy (progressive weakening of the heart muscle leading to a decline in the heart function), which is very often reversible when identified and treated properly.
Hope this helps.
YES it can. An overactive thyroid (hyperthyroidism) stimulates the heart to beat harder & faster. This can lead to congestive heart failure & even death. If you have this see a Dr immediately and get it taken care of as this is curable with medication, surgery or radioactive iodine.
Yes, it can rarely overtax the heart and cause heart failure, but the main problems are with heart rhythm, with palpitations and atrial fibrillation being common symptoms.


Gerald Lewis, MD