What term describes decreased perfusion and oxygen delivery to the body?

The term that best describes decreased perfusion and oxygen delivery to the body is "shock." Shock is a critical condition that occurs when the body's tissues do not receive adequate blood flow. This can result in insufficient oxygen and nutrients reaching vital organs, leading to organ dysfunction. Various types of shock exist, including hypovolemic, cardiogenic, distributive, and obstructive shock, each with different underlying causes but all resulting in decreased perfusion and oxygen delivery.

Ischemia refers specifically to the reduction of blood flow to a particular area of the body, often affecting localized tissues (such as during a heart attack or stroke), rather than a systemic reduction in perfusion. Cardiomyopathy is a disease of the heart muscle that can lead to heart failure but does not directly describe the condition of decreased perfusion occurring throughout the body. Tachycardia means an increased heart rate and can be a compensatory mechanism in response to shock but is not a term that defines decreased oxygen delivery itself.