MPI Definitions Flashcards
1
Q
Coronary reserve
A
Ability of coronary arteries to dilate if required to increase blood flow to the cardiac muscle to ensure sufficient oxygen supply.
2
Q
Coronary artyery stenosis
A
Inability of vessel to dilate during stress results in decreased coronary reserve.
3
Q
Describe CAS effect on perfusion
A
Coronary Artery Stenosis → Relative decrease in perfusion distal to obstruction
MPI
Rest → 90% reduction
Stress → 50% reduction
4
Q
Myocardial Ischemia
A
Imbalance 02 supply vs demand
Impaired myocardial oxidation, metabolism & dysfunction
Transient or permanent
Location dependent on blood vessel
5
Q
A
