Lena laughed. “You’re way off. Check the key.” But Jamie insisted: “This isn’t Case 14. The lead labels are wrong. Lead II is where V3 should be.”

PR interval is consistently >0.20 seconds. Every P is followed by a QRS.

For further practice with interactive feedback, you can use the Practical Clinical Skills EKG Quiz or download the Basic ECG Interpretation Practice Test from Banner Health. Banner Health step-by-step breakdown of how to calculate the heart rate from a rhythm strip?