Hello I appreciate your concern Since you already having cardiac arrhythmia so it s better to rule out heart disease first I.would like further information to help you better Are you having chest pain or palpitations Is it associated with shortness of breath In my opinion you should consult a cardiologist for clinical examination, recording of blood pressure and battery of tests like blood and urine tests and an EKG Hot flashes are very common after menopause so there are more probability for hormonal deficiency due to menopause you may require a hormonal replacement therapy if it is a recurrent problem You should take multivitamin and calcium supplements you can do yoga and relaxation exercises exercise regularly Avoid smoking and alcohol Hope this answers your question follow up questions are most welcome Best wishes