Hi , welcome to healthcaremagic i have read your question and understood your concern. Sinus arhythmia is not a thing for concern as such. It inficates variation in heart rate with breathing pattetn and is a normal phenomenon. About right axis deviation in ecg, there are number of causes for that which also include a normal variant or sometimes even wrongly recorded ecg. Sometumes it is seen in patients with pulmonary hypertension or elevated lung pressures. having read your query i feel what you are telling is machine report of ecg which may not always be accurate. I would suggest you a repeat ecg reporting from an expert and a 2d echocardiography which is simple ultrasonography of heart to see for any structural abnormality.