How is posterior MI detected in ECG?

Posterior infarction is diagnosed based on the presence of ST segment elevation >0.5mm in leads V7-9. Note that there is also some inferior STE in leads III and aVF (but no Q wave formation) suggesting early inferior involvement.

What causes STEMI ECG?

STEMI: Most commonly caused by an acute occlusion of a coronary blood vessel secondary to acute plaque rupture and thrombosis. However, cocaine use can also cause a STEMI due to coronary vasospasm, rather than occlusion with thrombosis.

What is the most probable treatment for STEMI?

The priority in treating a STEMI heart attack is to open the artery quickly, saving as much heart muscle as possible. Treatment options include percutaneous coronary intervention (PCI), a term that encompasses both angioplasty and stenting; clot-busting medication; and coronary artery bypass graft surgery (CABG).

Is a STEMI a Widowmaker?

The medical term for a widowmaker heart attack is an anterior ST-segment elevation myocardial infarction (STEMI). Each year, about 805,000 people in the United States have a heart attack, which happens when a portion of the heart does not receive enough oxygen-rich blood.

Can you survive a STEMI?

Summary: A new study finds that patients who suffer a STEMI heart attack while hospitalized are 10 times more likely to die than patients who suffer a STEMI outside the hospital. If you suffer a heart attack while walking down the street and are taken to the hospital quickly, your chances of survival are very good.

Which artery is blocked in a posterior MI?

Posterior MI occurs when either the LCX or a branch of the right coronary artery (RCA) supplying blood to the posterior wall of the left ventricle is occluded.

What causes a posterior MI?

Posterior myocardial infarction occurs when the posterior coronary circulation becomes disrupted. The two main branches of the coronary circulation are the right coronary artery and the left main coronary artery.

How is anterior STEMI treated?

The management of myocardial infarction should focus on hemodynamic stability, pain relief, increasing oxygen supply to the heart, and decreasing myocardium oxygen demand. 1. Oxygen: Supplemental oxygen should be administered to patients with arterial oxygen saturation of less than 90%.

What is posterior ECG?

The ECG in posterior STEMI is first characterized by ST-depression in the anterior leads. The ST depression is often deep (>2mm) and flat (horizontal).3. There will be a large R-wave in V2-3, even bigger than the S-wave.3 Normal R-waves progressively increase in height across the precordial leads.

What is posterior lead in ECG?

The standard ECG lead placement cannot directly illustrate what is occurring in the posterior heart. As a result, it is difficult to diagnose true PMIs . Isolated PMI is an indication for emergent reperfusion therapy and the absence of ST-segment elevation in the standard 12-lead ECG means the diagnosis is often missed.

What is the location of an EKG?

Electrode placement for a 12-lead ECG is standard, with leads placed on the left and right arm and left and right leg. Another pair of electrodes is placed between the fourth and fifth ribs on the left and right side of the sternum.