Cardiopulmonary manifestation of hypehyroidism-
The most common cardiovascular manifestation is sinus tachycardia, often associated with palpitations, occasionally caused by supra- ventricular tachycardia. The high cardiac output produces a bounding pulse, widened pulse pressure, and an aoic systolic murmur and can lead to worsening of angina or hea failure in the elderly or those with preexisting hea disease. Atrial fibrillation is more common in patients >50 years of age. Reference : page 2294 Harrison's Principles of Internal Medicine 19th edition
Tachycardia
Sinus bradycardia
Cardiomegaly
Low output cardiac failure
Endocrinology