The vast majority of MI involves the anterior wall (78%). The most common coronary artery affected is the left anterior descending (LAD) branch. Coronary dissection is the primary cause of infarction in the peripartum period and more commonly in the postpartum period.
Which artery is affected in 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.
Which artery is MI?
Help with the localisation of a myocardial infarct
|localisation||ST elevation||coronary artery|
|Septal MI||V1-V4, disappearance of septum Q in leads V5,V6||LAD-septal branches|
|Lateral MI||I, aVL, V5, V6||LCX or MO|
|Inferior MI||II, III, aVF||RCA (80%) or RCX (20%)|
What are the 3 vessels most commonly affected in acute myocardial infarction?
The left anterior descending artery was the most common culprit artery (48.3%), followed by the right coronary artery (30.9%), and the circumflex artery (20.8%). The most common acute STEMI type was inferior MI (52%).
Which coronary artery is affected in inferior MI?
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.
When is an 18 lead right sided ECG used?
The diagnosis of STEMI by synthesized 18-lead ECG is useful to identify the site of infarction in patients with infarction of the right ventricular wall (supplied by the RCA) or posterior wall of the left ventricle (supplied by the LCX), which often fail to be diagnosed by the standard 12-lead ECG.
When should you suspect 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).
What does anterior myocardial infarction mean?
Myocardial infarction is defined as the irreversible necrosis of heart muscle resulting from a decrease in blood supply to the heart due to coronary artery occlusion. …  Anterior myocardial infarction is associated with a decrease in blood supply to the anterior wall of the heart.
Which artery is the widow maker?
The widow-maker is a massive heart attack that occurs when the left anterior descending artery (LAD) is totally or almost completely blocked. The critical blockage in the artery stops, usually a blood clot, stops all the blood flow to the left side of the heart, causing the heart to stop beating normally.
How many types of myocardial infarction are there?
A heart attack is also known as a myocardial infarction. The three types of heart attacks are: ST segment elevation myocardial infarction (STEMI) non-ST segment elevation myocardial infarction (NSTEMI)
What are the warning signs of a myocardial infarction?
It can feel like uncomfortable pressure, squeezing, fullness or pain. Discomfort in other areas of the upper body. Symptoms can include pain or discomfort in one or both arms, the back, neck, jaw or stomach. Shortness of breath.
What is the difference between a heart attack and a myocardial infarction?
This blood clot can block the blood flow through the artery to the heart muscle. Ischemia results when the heart muscle is starved for oxygen and nutrients. When damage or death of part of the heart muscle occurs as a result of ischemia, it’s called a heart attack, or myocardial infarction (MI).
What happens if myocardial infarction is not treated?
During a heart attack, blood flow to the heart stops due to a blockage in a coronary artery. These are the arteries that carry blood to the heart. If a person does not receive immediate treatment, this lack of blood flow can cause damage to the heart.
Why is there no nitro in inferior MI?
Nitroglycerin is also contraindicated in the setting of an inferior MI with right ventricular involvement because, in this specific situation, the heart is dependent on preload.
What is the problem during a myocardial infarction?
A heart attack (myocardial infarction) happens when one or more areas of the heart muscle don’t get enough oxygen. This happens when blood flow to the heart muscle is blocked.
What are 3 common complications of a myocardial infarction?
Complications of myocardial infarction (MI) include arrhythmic complications, mechanical complications, left ventricular aneurysm formation, ventricular septal rupture, associated right ventricular infarction, ventricular pseudoaneurysm, and other issues.