Question

St Elevation Miocardial infraction pathopysiology schematic diagram

Answer 1

Step 1

The heart is the main organ in the body that needs its own constant supply of oxygen to work smoothly. There are two main and large arteries that give oxygenated blood to the heart. If there is any problem with any of these arteries, the heart doesn't get its required oxygen then the condition arises is called cardiac ischemia. If this cardiac ischemia lasts longer, then it is a heart attack otherwise it is called myocardial infraction meaning the death of heart muscles.

Step 2

The pathophysiology of myocardial infraction includes the following steps:

• Cholesterol deposition within the wall of the main artery.
• This deposition ultimately forms a plaque in the wall of the artery called atherosclerotic plaque. The formation of atherosclerotic plaque is a slow process and takes years to establish.
• Sometimes this plaque may rupture or erode, it leads to activation of the clotting mechanism so platelet aggregation and fibrin deposition, which leads to the formation of occlusive thrombus in a coronary artery.
• This occlusive thrombus completely blocks a coronary artery and interrupts the blood supply to part of the myocardium (heart muscle).
• It leads to irreversible changes and death of myocardial cells, & ultimately ST-segment elevates, myocardial infarction develops.

Step 3

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