2444, Lead placement

What is the purpose of the RL grounding lead in ECG?

• To measure the heart's electrical activity

• To minimize artifact

• To increase the amplitude of the ECG waveform

• To change the polarity of the ECG waveform

What is Einthoven's triangle used for in electrocardiography?

• To measure blood pressure

• To visualize the orientation of the electrical axis of the heart

• To determine heart rate

• To monitor respiratory rate

Which of the following leads is formed by connecting the positive electrode of lead I to the positive electrode of lead II?

• Lead III

• Lead aVR

• Lead aVL

• Lead aVF

In Lead I, where is the positive electrode placed?

• Right arm

• Left arm

• Right leg

• Left leg

Which lead is often considered a "negative" lead due to its reflection of electrical activity moving away from the right arm?

• aVL

• aVF

• aVR

• V1

What is the main direction of electrical activity in leads V1 and V2?

• From left to right

• From right to left

• From top to bottom

• From bottom to top

Which leads capture electrical signals from the anterior wall of the left ventricle?

• V1 and V2

• V3 and V4

• V5 and V6

• aVR and aVL

Where are the V5 and V6 leads placed on the chest?

• On the right side of the sternum

• On the left side of the sternum

• On the left side of the chest

• On the right side of the chest

Where is the V1 electrode placed?

• Fourth intercostal space, just to the left of the sternum

• Fourth intercostal space, just to the right of the sternum

• Fifth intercostal space at the midclavicular line

• Level with V4 but at the anterior axillary line

What is the purpose of the V2 electrode?

• Provides a view of the right ventricle and septal wall

• Offers a view of the septal wall of the heart

• Captures electrical activity between the right and left ventricles

• Provides a view of the lateral wall of the left ventricle