How is ischemia defined?

Ischemia is defined as decreased blood flow to tissue. This reduction in blood flow can lead to inadequate oxygen and nutrient delivery, which is essential for cellular metabolism. When blood supply is compromised, tissues may not receive enough oxygen to meet their metabolic needs, leading to potential functional impairment and, if prolonged, can result in tissue damage or necrosis.

Understanding ischemia is critical in clinical settings, especially in conditions such as heart disease, where it can lead to angina or myocardial infarction (heart attack). The correct definition emphasizes the importance of adequate blood supply in maintaining tissue health and function. This concept is foundational in respiratory care, as it relates to the management of patients with cardiovascular conditions that impact overall oxygenation and perfusion.