Segments: ST and PR Analysis — ECG Academy Lesson

Understand the difference between segments and intervals, master the PR segment as a baseline reference, and learn to identify ST elevation and depression — the most time-critical findings in cardiac monitoring.

Learning Objectives

• Distinguish between segments and intervals on the EKG
• Identify the PR segment and its role as the isoelectric baseline reference
• Locate the J point and define the ST segment boundaries
• Recognize ST elevation and ST depression and state the significance threshold (>1 mm)
• Explain why ST elevation is a time-critical emergency and describe the monitor tech response