I. Measurement

  1. Measure at 0.04 sec (1 mm) after the J-Point
  2. Compare to baseline (line drawn from P start to T end)

II. Causes

  1. Acute Myocardial Infarction
    1. SEE EKG changes in acute MI
  2. Pericarditis
    1. Diffuse ST Elevation
  3. Left Bundle Branch Block
    1. Findings
      1. Left Bundle Branch Block in lead V1
      2. QRS Duration > 120 ms
      3. QRS Complex negative (down) in V1
    2. Left ventricular activation delay
      1. Hides ST segment elevation
      2. Evaluate new LBBB as Acute Coronary Syndrome
  4. Pacemaker with paced beats from right ventricle
    1. Left Bundle Branch Block in V1 with pacer spike
    2. Not possible to diagnose Acute MI
  5. Left Ventricular Hypertrophy
    1. Increased QRS Complex amplitude
    2. ST segment elevation/depression in precordial leads
    3. T Wave direction opposite to QRS Complex
    4. Not possible to diagnose Acute MI
  6. Early Repolarization
    1. More common in black men, young and athletes
    2. Concave upwards (smiley) elevation
  7. Other causes
    1. Prinzmetal's Angina
    2. Hyperkalemia

Images: Related links to external sites (from Google)

Ontology: ST segment elevation (finding) (C0520886)

Definition (NCI) An electrocardiographic finding of ST segment elevation above the baseline.
Definition (NCI) An electrocardiographic finding of ST segment elevation above the baseline. (NCI)
Definition (NCI) Evaluation of the interval from the end of ventricular depolarization to the onset of the T wave; it is usually isoelectric in normal subjects.
Definition (NCI) EKG ST segment elevation is usually attributed to impending infarction, but can also be due to pericarditis or vasospastic (variant) angina and early repolarization. In some healthy young adults, a form of ST elevation can be normal. The height of the ST segment is measured at a point 2 boxes after the end of the QRS complex. ST segment elevation is considered significant if it exceeds 1 mm in a limb lead or 2 mm in a precordial lead.
Concepts Finding (T033)
SnomedCT 142094006, 164931005, 76388001
English ST ELEVATED, ECG ST ELEVATION, EKG ST Segment Elevation, ST SEGMENT ELEVATED, ECG ST segment elevated, ST elevation (finding), ST Elevation, ST ELEVATION, ST segment elevation (finding), Electrocardiogram ST segment elevation, EKG ST ELEVATION, electrocardiogram: ST segment elevated (procedure), electrocardiogram: ST segment elevated, ELEVATION, ST SEGMENT, ST SEGMENT ELEVATION, elevated st segment, st elevation, ecg st elevation, elevated st, st elevated, st segment elevated, elevation st, ekg st elevation, elevations st, st elevation ekg, st segment elevation, ST elevation, ST segment elevation, ST elevation (observable entity), ST elevated, ST segment elevated
Italian Sopraslivellamento del segmento ST dell'elettrocardiogramma, Sopraslivellamento del tratto ST, Tratto ST sopraslivellato, ST sopraslivellato
Dutch ST-segment stijging, ST-segment gestegen, ST gestegen, elektrocardiogram ST-segment optrekking
French Segment ST sus-décalé, Elévation du segment ST, ST sus-décalé, SUS-DECALAGE DE ST, Segment ST sus-décalé à l'électrocardiogramme
German ST-Strecke angehoben, ST-Streckenhebung, ST angehoben, ST STRECKENERHOEHUNG, Elektrokardiogramm ST-Streckenhebung
Portuguese ST elevado, Elevação do segmento ST, Segmento ST elevado, ELEVACAO DO ST, Segmento ST elevado (ECG)
Spanish Elevación del segmento ST, ST elevado, Segmento ST elevado, ST elevation, ST, ELEVACION, supradesnivel del ST (hallazgo), supradesnivel del ST, supradesnivel del intervalo S-T (entidad observable), supradesnivel del intervalo S-T, Elevación del segmento ST en el electrocardiograma, sobreelevación del segmento ST
Japanese 心電図ST部分上昇, ST上昇, ST部分上昇, STジョウショウ, STブブンジョウショウ, シンデンズSTブブンジョウショウ
Czech Elevace úseku ST na elektrokardiogramu, Elevace úseku ST, Zvýšený úsek ST, Zvýšený ST
Hungarian Elektrokardiogram ST szakasz emelkedés, ST szakasz emelkedett, ST szakasz emelkedés, ST emelkedett