27/02/2026
Many people are surprised to learn that their thyroid can affect their heart health. ๐
An overactive thyroid (hyperthyroidism) can trigger symptoms such as racing heart, palpitations, and some research reports 30โ40% higher risk* of atrial fibrillation โ an irregular heartbeat that can increase stroke risk. โก
Whereas an underactive thyroid (hypothyroidism) is less commonly linked directly to atrial fibrillation, but it can raise blood pressure and cholesterol and affect how well the heart relaxes between beats**, all of which can put extra strain on the heart over time. ๐ฃ
If you have a thyroid condition, a heart checkโup can be an important part of looking after your cardiovascular health. Itโs especially important not to ignore new, unexplained palpitations or an irregular heartbeat. ๐
Please book an appointment with our Cardiology Consultants to assess your symptoms and discuss how best to protect your longโterm heart health:
๐ 020 8949 9020
๐ link in comments
*The spectrum of thyroid disease and risk of new onset atrial fibrillation: a large population cohort study. BMJ. 2012;345:e7895
**Hypothyroidism and Cardiovascular Disease: A Review. Cureus. 2024 Jan 18;16(1):e52512