Common Mistakes: Performing a 12-Lead EKG
These are the specific ways this task goes wrong on the job — not hypothetical edge cases, but patterns that cause real documentation errors, patient-safety issues, or workflow problems.
Placing V1/V2 at the wrong intercostal space — a one-space error anywhere in the precordial leads changes the tracing's diagnostic value.
Skipping skin prep on a hairy or oily chest, leading to a noisy, hard-to-read tracing.
Letting the patient talk or shiver during the capture, introducing muscle-tremor artifact.
Assuming the tracing is fine without reviewing it for artifact before removing the leads.
How the Quality Checkpoints Prevent These
Every mistake above is caught by one of this task's quality checkpoints — the habit of checking these consistently is what actually prevents the error, not just knowing it exists.
- ✓
All 6 precordial leads are placed at their correct intercostal space and horizontal position — not estimated by eye.
- ✓
Skin is properly prepped at each electrode site to minimize artifact.
- ✓
The patient is instructed to breathe normally, not hold their breath, during the capture.
- ✓
The tracing is reviewed for quality before the patient is released from the table, so a repeat can be done immediately if needed.
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