Physio - usmle_guy

[ArchivalUser]

A 70 year old man was brought in the hospital by ambulance subsequent to chest pain that lasted 40 minutes. In order to assess the degree of stenosis of his coronary arteries, he underwent coronary angiography, a procedure during which a contrast dye was injected in his coronary vessels. To which phase of the ventricular action potential does visualization of the stenotic lesion correspond?

A. Phase 0
B. Phase 1
C. Phase 2
D. Phase 3
E. Phase 4

[ArchivalUser]

D. Phase 3

[ArchivalUser]

e?

[ArchivalUser]

its phase 4,,,,which follows repolarisation,,ventricular muscle relaxes in phase 4..coronary arteries are better filled..easy to visualise stenotic lesions.....electrical activity followed by mechanical activity

[ArchivalUser]

cronary arteries fill during diastole and diastole correspond to phase four of AP
so answer D?

[ArchivalUser]

Thank you!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Great question