What organs are affected by myocardial infarction?
A heart attack (medically known as a myocardial infarction) is a deadly medical emergency where your heart muscle begins to die because it isn’t getting enough blood flow. This is usually caused by a blockage in the arteries that supply blood to your heart.
Which artery is most affected in MI?
Most myocardial infarctions occurred in the right coronary artery (RCA; n=92, 44%) and left anterior descending artery (LAD; n=81, 39%) (Table 2).
Where can an infarction occur?
The dead tissue is called an infarct. Myocardial infarction (heart attack)—death of a section of heart muscle—results from obstruction of a coronary artery; the condition often accompanies coronary thrombosis. Infarctions may also occur in the lungs (pulmonary infarction) and the brain (see stroke).
How does myocardial infarction affect the body?
A heart attack affects the body by damaging the heart muscle. Without oxygen, the heart muscle begins to die and scar tissue forms there instead. The damage may lead to long-lasting problems.
What happens to the heart during a myocardial infarction?
If a blood clot totally blocks the artery, the heart muscle becomes “starved” for oxygen. Within a short time, death of heart muscle cells occurs, causing permanent damage. This is called a myocardial infarction (MI), or heart attack.
Which part of the heart is most affected by myocardial infarctions?
A myocardial infarction (MI), commonly known as a heart attack, occurs when blood flow decreases or stops to the coronary artery of the heart, causing damage to the heart muscle. The most common symptom is chest pain or discomfort which may travel into the shoulder, arm, back, neck or jaw.
What is ST elevation MI?
An ST-elevation myocardial infarction (STEMI) is a type of heart attack that mainly affects your heart’s lower chambers. They are named for how they change the appearance of your heart’s electrical activity on a certain type of diagnostic test.
What is the most common cause of infarction?
The most common cause of a myocardial infarction is the rupture of an atherosclerotic plaque on an artery supplying heart muscle. Plaques can become unstable, rupture, and additionally promote the formation of a blood clot that blocks the artery; this can occur in minutes.
Which organ can cause red infarction?
Red infarctions (hemorrhagic infarcts) generally affect the lungs or other loose organs (testis, ovary, small intestines). The occlusion consists more of red blood cells and fibrin strands. Characteristics of red infarcts include: occlusion of a vein.
What is an inferior myocardial infarction?
Inferior myocardial infarction. 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.
What are the criteria for myocardial infarction?
Myocardial Infarction. In order for a patient to be diagnosed with a myocardial infarction, they must have at least two of the following three criteria, according to the World Health Organization: As to the last point, comparing the patient’s current ECG within old ECG is an important part of diagnosis.
Which ECG abnormalities are characteristic of acute myocardial infarction?
Other ECG abnormalities relating to complications of acute myocardial infarctions may also be evident, such as atrial or ventricular fibrillation. Noninvasive imaging plays an important role in the diagnosis and characterisation of myocardial infarction.
Which histologic findings are characteristic of myocardial infarction?
Histopathological examination of the heart may reveal infarction at autopsy. Under the microscope, myocardial infarction presents as a circumscribed area of ischemic, coagulative necrosis (cell death).