1. J point: Answer The point where the QRS complex meets the ST segment 2. QRS complex: Answer measures the conduction through the ventricles Repolarization of the atrium is hidden in the QRS Represents ventricular depolarization leading to contraction of the ventricles Atrial repolarization also occurs here but it is not visible Should not be wide or narrow and measure no more than 0.12 3. T wave: Answer Represents the beginning of ventricular repolarization The ventricles are so big that when they relax it makes the t wave hump 4. How to read an EKG: Answer Determine the Heart Rate Identify the P wave Measure PR interval 0.12-0.20 Measure QRS interval <0>