Which finding on a 12-lead ECG would be diagnostic for STEMI?
Classically, STEMI is diagnosed if there is >1-2mm of ST elevation in two contiguous leads on the ECG or new LBBB with a clinical picture consistent with ischemic chest pain.
What does an ST elevation on a 12-lead ECG mean?
ST elevation refers to a finding on an electrocardiogram wherein the trace in the ST segment is abnormally high above the baseline.
Which ECG leads for STEMI?
In patients with STEMI the ECG leads displaying ST segment elevations actually reflect the ischemic area. This means that ST elevations in leads V3 and V4 (anterior chest leads) reflect anterior ischemia, and ST elevations in leads aVF and II reflect inferior ischemia.
What is a 12-lead ECG?
A 12-lead electrocardiogram (ECG) is a medical test that is recorded using leads, or nodes, attached to the body. Electrocardiograms, sometimes referred to as ECGs, capture the electrical activity of the heart and transfer it to graphed paper.
What is STEMI in ECG?
ST-Elevation Myocardial Infarction (STEMI) is a very serious type of heart attack during which one of the heart’s major arteries (one of the arteries that supplies oxygen and nutrient-rich blood to the heart muscle) is blocked. ST-segment elevation is an abnormality detected on the 12-lead ECG.
How many mm is ST elevation?
Anterior STEMI requires 2 mm of ST elevation in V2 and V3 in men > 40 years old according to the ACC/AHA definition. A total of 2.5 mm is required in men < 40 years old and only 1.5 mm required in women.
What is stemi in ECG?
What causes ST elevation in stemi?
ST segment elevation occurs because when the ventricle is at rest and therefore repolarized, the depolarized ischemic region generates electrical currents that are traveling away from the recording electrode; therefore, the baseline voltage prior to the QRS complex is depressed (red line before R wave).
What are the different leads that are recorded on a 12-lead ECG?
A 12-lead ECG consists of three bipolar limb leads (I, II, and III), the unipolar limb leads (AVR, AVL, and AVF), and six unipolar chest leads, also called precordial or V leads, ( , , , , , and ).