Nano homeopathy Thyroid and 💓 disease. When the thyroid gland puts out too little hormone which is called an underactive thyroid and in medical team is hypothyroidism. It may cause a slow heart rate a rise in chalesteral. Heart failure and an increase in fauid around the heart.a precursor to hypothyroidism is know as subclinical hypothyroidism may cause some changes in the blood fats and blood vessel function it leads to an increase risk of narrowing of the arteries.when the thyroid puts out too much hormone it is know as an overactive thyroid or hyperthyroidism this cause the heart to beat faster it may lead to palpitations or an irregular heartbeat know as atrial fibrillation (afib). Contact as:09312311849.