What information is in an electrocardiogram?

Expert Answers
dano7744 eNotes educator| Certified Educator

Electrocardiogram's (EKG or ECG) represent a depiction of the electrical events in the myocardium that make mechanical events take place. EKG's contain waves and wave forms. Each wave on the EKG tracing tells a story of a mechanical action that the heart is taking. EKG's are "12 lead", a lead is a different view from a different angle. It's like taking a photo from a different position or angle.

The normal waveforms are P,QRS, and T. The P wave represents depolarization of the atria. The QRS complex represents depolarization of the ventricles. The T wave represents repolarization(re  not de) of the ventricular walls.

Other wave forms exist, but are abnormal, and represent disease or ischemia in the muscle. It is important for students to realize that in order to recognize something that is Abnormal, they first must be able to recognize the Normal waveforms.

besure77 eNotes educator| Certified Educator

An electrocardiogram (EKG) checks for problems in the heart via electrical activity. Electrodes are placed in very specific areas of the body. Measurements are then made and they are translated onto a piece of paper. These measurements are called waves and they are measured by a specialist.

Usually, EKG's are performed when a person is having chest pain, possibly due to a heart attack, pericarditis, or angina. They may also be performed to check for symptoms of heart disease, such as shortness of breath or dizziness. In addition, EKG's can also find out if the walls of the heart chambers are too thick.

kc4u | Student

Electrocardiogram or ECG is a diagnostic procedure to record and measure the electrical activities of the heart, interpretation of which provide us with the information relating to various ailments/conditions of the heart from minor to life-threatening dimension. In 1924, William Einthoven received the Nobel Prize for his developing the procedure.

In all, ten small electrode pads are placed across the chest and on each arm and leg of the patient. These pads are connected by insulated wires to the ECG machine. The movements of the heart muscles and the rhythm of the heart are recorded in minute details on a graph paper. Proper interpretation of the waves recorded graphically provides important information as regards the condition of the heart under review.

krishna-agrawala | Student

Electrocardiogram (ECG) is a graph of the pattern of beating of the heart,  recorded using an equipment called electrocardiograph. Doctors ECG to detect heart damage or disturbances of the heart rhythm.

The Instrument records the activity of the heart muscles and converts them in the form of a graph over a time period. several pens incorporated in the the instrument make marks on a moving strip of paper as the activity of different heart muscles cause the position of the pens to change. This produces a group of several graph with time represented on the x-axis, and activity of heart muscles on the y-axis.

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