A patient arrives for an ECG and you are responsible for setting up the equipment. You notice that the lead wires are not labeled. Based on the universal lead positioning, where should you place the V4 electrode?
At the fourth intercostal space, to the left of the sternum
At the fifth intercostal space, at the midclavicular line
On the fifth intercostal space, aligning with the anterior axillary line
On the fifth intercostal space, in line with the midaxillary line
The V4 electrode is placed at the fifth intercostal space, at the midclavicular line. This precise location ensures consistent readings across different ECG tests and patients. It is crucial for reflecting the electrical activity of the septal and anterior regions of the heart. The other options are incorrect as they reflect the placement for different electrodes. V2 is positioned at the fourth intercostal space, to the left of the sternum; V5 is also placed on the fifth intercostal space but aligns with the anterior axillary line; and V6 should be at the fifth intercostal space, in line with the midaxillary line.
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