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The electrical impulses trigger the heartbeat that travels down a pathway through the heart.

ECG or Electrocardiograph is a test that is used to assess the muscular and electrical functionalities of the heart. It is a painless test which can be conducted in a few minutes and results can also be read instantly. An electrocardiograph is basically a graph of voltage plotted against time of electrical activity of the heart. The electrical activity of the heart – The electrical system is the power source that makes the working of the heart possible in a nutshell. The electrical impulses trigger the heartbeat that travels down a pathway through the heart. These pathways are conduction pathways and they are responsible for causing ventricles of the heart to contract and pump out blood. The human heart has a natural pacemaker which produces these electrical impulses all by itself. These electrical impulses generate an electrical current that spreads over our body. An electrocardiogram measures these currents in the form of wave graphs on a paper. The electrodes of the electrocardiogram are placed on the skin to note the normal working conditions of the heart. These electrodes detect the electrical impulses occurring during each heartbeat. The impulses are picked up from the changes in an electrical path on the skin. These changes arise from the heart muscles and the electrophysiologic patterns of the depolarizing. Let’s have a look at some solved Multiple-choice questions on ECG

Answer: (d) 2.In case of a normal Heartbeat, Depolarization stimulus arises in which of the following?

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