How does myocardial infarction cause strokes?
How does myocardial infarction cause strokes?
Left ventricular (LV) thrombi early after MI in the setting of anterior wall infarction is considered the prevailing cause for MI‐associated ischemic stroke, resulting from LV regional wall akinesia and dyskinesia leading to blood stasis as well as inflammatory changes and hypercoagulability during acute MI.
What is an inferior STEMI?
An inferior wall MI — also known as IWMI, or inferior MI, or inferior ST segment elevation MI, or inferior STEMI — occurs when inferior myocardial tissue supplied by the right coronary artery, or RCA, is injured due to thrombosis of that vessel.
What causes inferior infarct?
An inferior myocardial infarction results from occlusion of the right coronary artery (RCA). This can cause a ST elevation myocardial infarction or a non-ST segment elevation myocardial infarction.
Can a stemi cause a stroke?
AF after a STEMI occurs in up to 20% of patients and can cause increased in-hospital and long-term mortality, increased stroke with profound morbidity [50,51,52], and increased mortality from both sudden and non-sudden cardiac death [52].
How is inferior STEMI diagnosed?
Inferior STEMI:
- Marked ST elevation in II, III and aVF with early Q-wave formation.
- Reciprocal changes in aVL.
- ST elevation in lead III > II with reciprocal change present in lead I and ST elevation in V1-2 suggests RCA occlusion with associated RV infarction: This patient should have right-sided leads to confirm this.
Which leads are inferior MI?
Inferior STEMI is usually caused by occlusion of the right coronary artery, or less commonly the left circumflex artery, causing infarction of the inferior wall of the heart [6, 7]. Upon ECG analysis, inferior STEMI displays ST-elevation in leads II, III, and aVF.
What does inferior infarct mean on an ECG?
An inferior myocardial infarction (MI) is a heart attack or cessation of blood flow to the heart muscle that involves the inferior side of the heart. Inferior MI results from the total occlusion of either the right coronary artery in 85% of the cases or the left circumflex in 15% of the cases.
What is STEMI?
A STEMI (ST-Segment Elevation Myocardial Infarction) is the most severe type of heart attack. A heart attack or myocardial infarction happens when an artery supplying blood to the heart suddenly becomes partially or completely blocked by a blood clot.
What is STEMI (STEMI)?
It is a clinical syndrome involving myocardial ischemia, EKG changes and chest pain. An acute ST-elevation myocardial infarction (STEMI) is an event in which transmural myocardial ischemia results in myocardial injury or necrosis.[1]
What is the prognosis of inferior STEMI with right ventricular infarction?
Up to 40% of patients with an inferior STEMI will have a concomitant right ventricular infarction. These patients may develop severe hypotension in response to nitrates and generally have a worse prognosis.
What are the characteristics of early inferior STEMI?
Early inferior STEMI: 1 Hyperacute (peaked) T waves in II, III and aVF with relative loss of R wave height 2 Early ST elevation and Q-wave formation in lead III 3 Reciprocal ST depression and T wave inversion in aVL 4 ST elevation in lead III > lead II suggests an RCA occlusion; the subtle ST elevation in V4R would be consistent with… More
What causes second-degree atrioventricular (AV) block in inferior STEMI?
Up to 20% of patients with inferior STEMI will develop either second- or third-degree AV block. There are two presumed mechanisms for this: Ischaemia of the AV node due to impaired blood flow via the AV nodal artery. This artery arises from the RCA 80% of the time, hence its involvement in inferior STEMI due to RCA occlusion.
