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ST Elevation
Aka: ST Elevation, ST-Segment Elevation, ST Segment Elevation
- See Also
- Electrocardiogram in Myocardial Infarction
- ST Segment
- Electrocardiogram
- Measurement
- Measure at 0.04 sec (1 mm) after the J-Point
- Compare to baseline (line drawn from P start to T end)
- Causes
- Acute Myocardial Infarction
- See Electrocardiogram in Myocardial Infarction
- Pericarditis
- Diffuse ST Elevation
- Left Bundle Branch Block
- Findings
- Left Bundle Branch Block in lead V1
- QRS Duration > 120 ms
- QRS Complex negative (down) in V1
- Left ventricular activation delay
- Hides ST Segment Elevation
- Evaluate new LBBB as Acute Coronary Syndrome
- Pacemaker with paced beats from right ventricle
- Left Bundle Branch Block in V1 with pacer spike
- Not possible to diagnose Acute MI
- Left Ventricular Hypertrophy
- Increased QRS Complex amplitude
- ST Segment Elevation/depression in precordial leads
- T Wave direction opposite to QRS Complex
- Not possible to diagnose Acute MI
- Early Repolarization
- More common in black men, young and athletes
- Concave upwards (smiley) elevation
- Other causes
- Prinzmetal's Angina
- Hyperkalemia
- Neurologic catastrophe (e.g. Subarachnoid Hemorrhage)
- References
- Wang (2003) N Engl J Med 349:2128-35 [PubMed]