Artificial Pacemaker is a medical device which uses electrical impulses, delivered by electrodes contracting the heart muscles, to regulate the beating of the heart. The primary purpose of a pacemaker is to maintain an adequate heart rate, either because the heart's natural pacemaker is not fast enough, or because there is a block in the heart's electrical conduction system. The problems in early pacemakers are mainly due to breakage of electrode wires, short battery life and the need for surgery for pacemaker implantation. The insulation in the cardiac lead is also a major risk and it results in complications. To improve the cardiac lead performance, strength and life, numerical simulation of insulation wear is done under various cases using ABAQUS software. The obtained results are validated with the experimental results inferred in the literature survey.