Question

A 56 year old male arrives to the emergency setting with chest pain. After physical examination, the emergency physician asks for an ECG and diagnoses an ST elevation myocardial infarction at that moment he calls the cardiologists for consult.When the cardiologists arrives, he introduces a stent in the left anterior descending artery.Which kind of Metabolic response is expected to be found after the opening of the vessel?

A) Active Hyperemia

B) Baroreceptor response

C)Activation of RAA system

D) Endotheline secretion

E)Reactive Hyperemia

Answer 1

Ans:- e) Reactive hyperemia.

Reactive hyperemia refers to a temporary increase in blood flow to an area after a period of arterial occlusion. Vasodilators secreted by blood deprived cells dilate deprived vessels ensuring that, post occlusion, blood will experience minimal resistance when resupplying the area.

Active hyperemia happens when there’s an increase in the blood supply to an organ. This is usually in response to a greater demand for blood — for example, if you’re exercising.