ST-segment elevation
Electrocardiographic finding indicating acute transmural myocardial ischemia, diagnostic criterion for STEMI when meeting voltage thresholds.
Full Definition
ST-segment elevation refers to the upward displacement of the ST segment on a 12-lead electrocardiogram, indicating acute transmural myocardial ischemia typically caused by complete coronary artery occlusion. Diagnostic criteria require ≥1 mm elevation in two contiguous limb leads or ≥2 mm elevation in two contiguous precordial leads. In cardiovascular research, ST-segment elevation serves as both a diagnostic criterion for patient enrollment and an outcome measure for reperfusion therapy efficacy. Studies often analyze ST-segment resolution as a marker of successful reperfusion. Editors should verify that diagnostic criteria and measurement protocols are consistent with current guidelines.
Usage
Usage note: Hyphenate compound terms. Specify voltage thresholds and lead requirements when used as diagnostic criteria.
In Context
- "Patients with ≥2 mm ST-segment elevation in leads V2-V4 were enrolled in the anterior STEMI cohort." — ECG criteria specification
- "Complete ST-segment resolution occurred in 73% of patients 90 minutes post-PCI." — Reperfusion success assessment