Introduction to ECG | The Basics | Einthoven’s Triangle, Limb, Augmented and Precordial Leads

The video tutorial explains Einthoven's triangle and ECG lead placement, covering limb, augmented, and precordial leads. It details the placement and function of each lead type, including their positive and negative electrodes. The tutorial also discusses the heart's depolarization process and how it relates to lead angles, emphasizing the importance of lead two. The precordial leads are described as projecting perpendicularly from the screen, providing a comprehensive understanding of ECG lead systems.

Which of the following describes the correct placement of Lead I in Einthoven's Triangle?

• From the left arm to the right leg

• From the left leg to the right arm

• From the right leg to the left leg

• From the right arm to the left arm

What is the positive electrode placement for the AVF lead?

• Left arm

• Right foot

• Left foot

• Right arm

What is the positive electrode placement for the AVL lead?

• Left foot

• Right foot

• Left arm

• Right arm

How does the heart's mean vector of depolarization relate to Lead II?

• It is opposite to Lead II

• It aligns with Lead II

• It is perpendicular to Lead II

• It is parallel to Lead I

Which lead is considered particularly important due to its alignment with the heart's depolarization vector?

• AVR

• Lead II

• Lead I

• Lead III

Which of the following best describes the orientation of precordial leads?

• They are in the same plane as limb leads

• They project out perpendicular to limb leads

• They are parallel to augmented leads

• They are in the same plane as augmented leads

What is the primary function of precordial leads?

• To measure heart rate

• To project out perpendicular to limb and augmented leads

• To provide a 2D view of the heart

• To align with the heart's depolarization vector

What degree is assigned to Lead I in the lead degree system?

• 90 degrees

• 120 degrees

• 60 degrees

• 0 degrees

Which lead is associated with a positive 60-degree orientation?

• Lead III

• Lead II

• AVF

• Lead I

Which lead is associated with a positive 90-degree orientation?

• Lead III

• AVF

• Lead I

• Lead II