The incomplete right bundle branch block
seems to be a congenital condition and you need to show him to a cardiologist as he's symptomatic. Hashimoto's thyroiditis
, if causing hypothyroidism
, then only causes headache kind of symptoms. Fluid retention causes burden on the heart. Hypothryoidism, if any, please get treated properly as it will avoid fluid retention in him. I hope you got your answer. For any further query please get back.