Electrophysiology study is an advanced evaluation of heart rhythm disorders. It is usually resorted to in cases where simple medications are not effective in controlling the rhythm abnormalities. Generally it is done without any sedation or general anaesthesia as it is not very painful. Local anaesthesia is given at the sites where the blood vessels are punctured to introduce small electrodes into the various chambers of the heart for recording the electrical activity of the heart internally. Each electrode has multiple recording poles – bipolar with two recording poles, quadripolar with four recording poles, decapolar with ten recording poles and duo-decapolar with 20 electrode poles.