What leads show a posterior MI?

In patients presenting with ischaemic symptoms, horizontal ST depression in the anteroseptal leads (V1-3) should raise the suspicion of posterior MI. Posterior infarction is confirmed by the presence of ST elevation and Q waves in the posterior leads (V7-9).

How is posterior wall MI diagnosed on ECG?

The ECG findings of an acute posterior wall MI include the following:

1. ST segment depression (not elevation) in the septal and anterior precordial leads (V1-V4).
2. A R/S wave ratio greater than 1 in leads V1 or V2.
3. ST elevation in the posterior leads of a posterior ECG (leads V7-V9).

Which ECG leads show posterior wall MI?

Isolated or “True” Posterior Myocardial Infarction Therefore, posterior infarction appears on the standard 12-lead ECG primarily as ST depressions in leads V1-V4,[8][9] usually deepest in leads V2-V4.

Is posterior MI serious?

Complications. The risk of ventricular aneurysm, rupture and death may be greater than with myocardial infarctions at other sites. Rupture of chordae tendinae can lead to valve incompetence. Rupture of the septum appears to be a special risk with a high mortality despite surgical repair.

How is posterior MI treated?

The definitive management of acute posterior STEMI is reperfusion therapy. Optimally this is done via percutaneous coronary intervention (PCI), though the next option would be fibrinolytic therapy. PCI is the preferred option if it can be initiated within 120 minutes, though within 90 minutes is the goal.

How do I know if I have anterior or posterior STEMI?

Main ECG pointers for Posterior STEMI:

1. Look for deep (>2mm) and horizontal ST-segment depression in the anterior leads and large anterior R-waves (bigger than the S-wave in V2).
2. Posterior STEMI often occurs along with an inferior or lateral STEMI, but can also occur in isolation.

How can you tell if you have a posterior STEMI?

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.

How can you tell if you have a posterior stemi?

What are symptoms of anterior myocardial infarction?

Anterior myocardial infarction is a term denoting ischemia and necrosis of the anterior myocardial wall due to occlusion of the left anterior descending artery. A sudden onset of chest pain that often radiates to the arm and neck accompanied by dyspnea, nausea, vomiting, weakness, and diaphoresis are some of the most common symptoms.

What is posterior MI?

A posterior wall MI occurs when posterior myocardial tissue (now termed inferobasilar), usually supplied by the posterior descending artery — a branch of the right coronary artery in 80% of individuals — acutely loses blood supply due to intracoronary thrombosis in that vessel.

What is an inferior myocardial infarction?

An inferior myocardial infarction is a problem with the heart where cells along the inferior wall of the heart die in response to oxygen deprivation.