Which of the following conditions indicates a decrease in blood flow due to artery blockage?

Ischemia is the condition that specifically refers to a decrease in blood flow to a tissue, typically due to a blockage in the arteries. This reduced blood flow can lead to a deficiency in oxygen and essential nutrients needed by the tissues for proper function, which can cause pain and other serious complications. In the context of artery blockage, ischemia highlights the impact that reduced blood supply can have on different organs and tissues in the body.

While strokes, myocardial infarction, and angina pectoris are all serious conditions associated with blood flow issues, they are more specific outcomes or symptoms resulting from ischemia. For instance, a stroke occurs when blood flow to a part of the brain is obstructed, leading to tissue damage, while a myocardial infarction, commonly known as a heart attack, happens when blood flow to the heart muscle is blocked. Angina pectoris involves chest pain due to reduced blood flow to the heart but is characterized by temporary ischemic episodes.

Thus, while these conditions are related to the consequences of artery blockage and ischemia, the term that directly describes the reduction in blood supply itself is ischemia.