What is ECG ST Segment Elevation?
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Article at a Glance
- Criteria for ST-segment elevation from the baseline include:
- Determining the baseline.
- Finding the ST segment.
- Evaluating the J point where QRS ends and the beginning of the ST segment.
- Add 0.04 segment to the J point and determine at that point if the ST segment is above the baseline.
This lesson illustrates how to determine ST-segment elevation on an electrocardiogram (ECG). We’ll look at one complex and an ST-segment elevation determination criteria. Elevation refers to elevation from the baseline. First, determine your baseline, which is the ECG segment where nothing occurs. Look at the least active part of the ECG between a T wave and P wave. It’s known as the TP segment. Find a couple of them, draw a line between them, and mark your baseline. The ST segment goes from the end of the QRS to the beginning of the T wave. It may be difficult to find the ST segments and deviation source. If so, look at the QRS complex next to it. It may provide a better view. You may also have to scan for other leads contiguous to that lead. After you find it, add one small box equal to 0.04 seconds to the right. That is where you measure the ST Segment elevation down to baseline. Read: General Stroke CareST-Segment Elevation
To determine ST-segment elevation, find the baseline first. Next, find the J point and move 0.04 seconds, or one small box, to the right. Finally, measure from that point to baseline. That is the ST segment elevation.Summary
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