Is ischemic heart disease the same as myocardial infarction?

Acute coronary syndrome (ACS, formerly called ischemic heart disease) refers to a large spectrum of clinical conditions including unstable angina, myocardial injury, and myocardial infarction (MI). ACS is caused by a sudden onset of cardiac tissue ischemia secondary to impaired blood flow.

What condition leads to myocardial infarction?

Myocardial infarction (MI) usually results from an imbalance in oxygen supply and demand, which is most often caused by plaque rupture with thrombus formation in an epicardial coronary artery, resulting in an acute reduction of blood supply to a portion of the myocardium.

How is ischemia different from infarction?

Ischemia denotes diminished volume of perfusion, while infarction is the cellular response to lack of perfusion.

What is the difference between ischemic heart disease and coronary heart disease?

Ischemic means that an organ (e.g., the heart) is not getting enough blood and oxygen. Ischemic heart disease, also called coronary heart disease (CHD) or coronary artery disease, is the term given to heart problems caused by narrowed heart (coronary) arteries that supply blood to the heart muscle.

How does a myocardial infarction affect the cardiovascular system?

The lack of blood flow can occur because of many different factors but is usually related to a blockage in one or more of your heart’s arteries. Without blood flow, the affected heart muscle will begin to die. If blood flow isn’t restored quickly, a heart attack can cause permanent heart damage and death.

What happens to the heart after a myocardial infarction?

After myocardial infarction (MI), the heart undergoes extensive myocardial remodeling through the accumulation of fibrous tissue in both the infarcted and noninfarcted myocardium, which distorts tissue structure, increases tissue stiffness, and accounts for ventricular dysfunction.

How does ischemia cause arrhythmia?

Myocardial ischaemia is characterised by ionic and biochemical alterations, creating an unstable electrical substrate capable of initiating and sustaining arrhythmias, and infarction creates areas of electrical inactivity and blocks conduction, which also promotes arrhythmogenesis.

What is the difference between myocardial ischemia and myocardial injury?

Specifically, myocardial injury is defined by at least 1 cardiac troponin concentration above the 99th percentile upper reference limit. Myocardial infarction is a form of myocardial injury but requires clinical evidence of acute myocardial ischemia.

What is myocardial ischemia?

Myocardial ischemia occurs when blood flow to the heart muscle (myocardium) is obstructed by a partial or complete blockage of a coronary artery by a buildup of plaques (atherosclerosis). If the plaques rupture, you can have a heart attack (myocardial infarction).

Which complication is most likely to occur after a myocardial infarction MI?

Ventricular free wall rupture. VFWR is the most serious complication of AMI. VFWR is usually associated with large transmural infarctions and antecedent infarct expansion. It is the most common cause of death, second only to LV failure, and it accounts for 15-30\% of the deaths associated with AMI.

https://www.youtube.com/watch?v=lnYqZZgqxNs