Which condition is also known as a heart attack and involves nonreversible damage to the heart due to a lack of oxygen?

Which condition is also known as a heart attack and involves nonreversible damage to the heart due to a lack of oxygen?

• A. Myocardial Infarction
• B. Pericarditis
• C. Angina
• D. Dysrhythmias

Answer: (A)

The concept tested is myocardial infarction, which is a heart attack. It occurs when a coronary artery becomes blocked, cutting off blood flow to part of the heart muscle. Without oxygen, the affected heart tissue sustains irreversible injury and dies, which is why this is described as nonreversible damage. That combination of oxygen deprivation and tissue death defines a heart attack. In contrast, pericarditis is inflammation of the heart’s surrounding lining and doesn’t inherently involve irreversible heart muscle damage from oxygen loss. Angina is chest pain from temporary, reversible ischemia—there’s not yet any necrosis. Dysrhythmias are abnormal heart rhythms and don’t by themselves mean there’s muscle tissue death from lack of oxygen.

The concept tested is myocardial infarction, which is a heart attack. It occurs when a coronary artery becomes blocked, cutting off blood flow to part of the heart muscle. Without oxygen, the affected heart tissue sustains irreversible injury and dies, which is why this is described as nonreversible damage. That combination of oxygen deprivation and tissue death defines a heart attack.

In contrast, pericarditis is inflammation of the heart’s surrounding lining and doesn’t inherently involve irreversible heart muscle damage from oxygen loss. Angina is chest pain from temporary, reversible ischemia—there’s not yet any necrosis. Dysrhythmias are abnormal heart rhythms and don’t by themselves mean there’s muscle tissue death from lack of oxygen.