04/08/2023
Do you know the importance of leads and its placement when performing an ECG?
When performing an electrocardiogram (ECG), sensors called electrodes are placed on the patient's skin to record the electrical activity of the heart. The number of electrodes and leads used can vary depending on the type of ECG being performed.
In-patient monitoring: 3 leads are typically used, which require 3 electrodes to be placed on the left chest, right chest, and left limb. These leads monitor the electrical activity of the heart in three different planes, providing a basic assessment of the heart's function.
Stress test: 12 leads and 10 electrodes are used to monitor the heart's electrical activity during physical activity. The additional leads provide a more detailed assessment of the heart's function during exercise, which can help diagnose heart disease or other conditions.
Resting monitoring: 12 leads and 10 electrodes are also used. This type of ECG provides a more detailed assessment of the heart's function at rest, which can help diagnose conditions that may not be apparent during physical activity.
Holter monitor: A portable device that records the heart's rhythm over a 24-hour period. This type of monitoring requires 5 leads and 5 electrodes to be placed on the chest, use to detect or determine the risk of irregular heartbeats (arrhythmias).
It's important to note that while different types of ECGs require different numbers of leads and electrodes, they all provide valuable information that can help diagnose and monitor heart conditions.
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