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- Electrocardiography (ECG)
- 12-Lead ECG Placement Guide with Illustrations
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Electrocardiography studies the heart's electrical activity produced during myocardial contraction and relaxation, usually recorded by electrodes on the skin.
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12-Lead ECG Placement Guide with Illustrations
Keep in mind that RL is neutral (also known as point zero where the electrical current is measured). RL doesn't come up in ECG readings, and is considered as .
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As a non-invasive yet most valuable diagnostic tool, the lead ECG records the heart's electrical activity as waveforms. When interpreted accurately, an ECG can detect and monitor a host of heart conditions - from arrhythmias to coronary heart disease to electrolyte imbalance. Since the first telecardiogram recorded in , huge strides have been made in the recording and interpretation of ECG. A lead ECG paints a complete picture of the heart's electrical activity by recording information through 12 different perspectives. Think of it as 12 different points of view of an object woven together to create a cohesive story - the ECG interpretation. These 12 views are collected by placing electrodes or small, sticky patches on the chest precordial , wrists, and ankles. These electrodes are connected to a machine that registers the heart's electrical activity.
A 12 lead electrocardiography ECG shows the electrical activity occurring in a patient's heart at the moment it is recorded. It is an important diagnostic investigation for arrhythmia's, such as atrial fibrillation, or in more serious conditions such as myocardial infarction or in cardiac arrest. It is therefore an essential skill to be able to perform, as well as being able to interpret the ECG findings. Explain what you are going to do and gain consent to proceed. Clarify whether the patient knows why the test is being performed, such as for chest pain. Ensure the patient is comfortable, for this test the patient must have their top off so offer a chaperone.