When cardiology meets endocrinology: sustained atrial flutter associated with thyrotoxic periodic paralysis.

Periodic paralysis is a rare muscle disease that manifests as episodes of painless muscle weakness, and the hypokalemic form is commonly associated with hyperthyroidism. Most tachyarrhythmias related with thyrotoxicosis include sinus tachycardia and atrial fibrillation, but an association between thyrotoxic hypokalemic periodic paralysis and typical atrial flutter has seldomly been documented. Here, we present the case of a young male who was diagnosed with thyrotoxic periodic paralysis causing cavotricuspid isthmus-dependent atrial flutter, successfully treated with diltiazem, propranolol, methimazole, potassium iodine (SSK) and rivaroxaban.

Aorto-cavitary fistula to the left ventricle with severe aortic regurgitation as a complication of prosthetic valve infective endocarditis: a novel report.

Infective endocarditis can present in different clinical forms and lead to a variety of complications depending on the affected valvular and perivalvular structures. We describe a case of a 74-year-old male who developed an aortic-cavitary fistulous tract as a complication of prosthetic aortic valve infective endocarditis. Transesophageal echocardiography (TEE) revealed an aorto-cavitary fistula (ACF) connecting the aortic root with the left ventricle, creating an intracardiac shunt, which resulted in severe aortic regurgitation physiology.

Carcinoid Right Heart Disease.

Carcinoid heart disease is an unusual cause of right heart failure. We present the case of a 53-year-old man with a history of metastatic carcinoid tumors originating from the appendix, status post-chemotherapy, and liver embolizations. The patient presented with a right-sided valvular disease with severe pulmonic valve regurgitation, right ventricle dilation and pulmonary hypertension.