EKG Basics

Question 1

Atrial depolarization is recorded as a [ ] wave on EKG

Answer 1

P

Question 2

AV valves are:

Answer 2

The mitral and tricuspid valves

Question 3

Depolarization of the ventricular myocytes produces a [ ] complex on the ECG and initiates contraction of the ventricles

Answer 3

QRS

Question 4

The horizontal segment of baseline that follows the QRS complex is known as the [ ] segment

Answer 4

ST

Question 5

Which ions cause myocyte contraction?

Answer 5

Calcium ions

Question 6

Which ions causes repolarization of myocytes?

Answer 6

Potassium ions

Question 7

Leads V3 and V4 are oriented over the area of:

Answer 7

The interventricular septum (separates the cavity of the right ventricle from the cavity of the left ventricle)

Question 8

Einthoven’s Law of Leads:

Answer 8

II = I + III