Cardiac Conductivity and EKG Interpretation

Cardiac Conductivity and EKG Interpretation

By Elaina Mathiesen

Learning Objectives

1. Explain the cardiac conduction system of the heart.

2. Describe action potential and refractory periods.

3. Identify the various components on the electrocardiogram (P wave, QRS complex, ST segment).

4. Differentiate supraventricular and ventricular arrhythmias.

5. Compare first, second (Wenckebach and Mobitz) and third-degree heart blocks.

Electrical Conductivity Through the Heart

Normal Sinus Rhythm

Sinus Bradycardia

Sinus Tachycardia

Supraventricular Tachycardia

Atrial Fibrillation

Atrial Flutter

Ventricular Tachycardia

Ventricular Fibrillation

1st Degree Heart Block

2nd Degree Mobitz I Heart Block

Wenckebach​

2nd Degree Mobitz II Heart Block​

3rd Degree Heart Block​