Question

What is a modified chest lead with the positive electrode placed on the right mid chest at the 4th intercostal space? It can help determine the origin of abnormal complexes.

A. Augmented Vector Right (aVR)
B. Augmented Vector Left (aVL)
C. Augmented Vector Foot (aVF)
D. Right Precordial Lead (V4R)

Answer 1

The positive electrode placed on the right mid chest at the 4th intercostal space is known as Right Precordial Lead (V4R), which is used in an ECG to help determine the origin of abnormal heart complexes.

Step-by-step explanation:

The modified chest lead with the positive electrode placed on the right mid chest at the 4th intercostal space is known as Right Precordial Lead (V4R). An electrocardiogram (ECG) is a test that measures the electrical activity of the heart and displays it as a wave on a monitor or paper.

This lead, V4R, is particularly helpful in determining the origin of abnormal complexes or assessing the heart from different angles, potentially indicating conditions such as right ventricular myocardial infarction. It is not typically included in the standard 12-lead ECG, but can be used in specific situations to provide additional clinical information about the heart's function.