…proper alignment of rest and stress images to accurately compare corresponding myocardial regions, as misalignment can lead to incorrect interpretation of perfusion differences. Perfusion assessment…

…high spatial and temporal resolution. PET offers higher spatiotemporal quality, as compared with SPECT. Quantification of blood flow using PET Quantitative PET perfusion imaging offers…

…exercise or the use of chronotropic and inotropic agents. Radiotracers are employed to evaluate myocardial perfusion by measuring the intensity of their uptake within the…

…induce myocardial electrical activity by generating adequate coronary perfusion pressure (CPP). Myocardial activity is necessary to salvage the brain, and is therefore of prime importance…

…perfusion imaging can determine whether dysfunctional myocardium or myocardium supplied by a diseased vessel, is viable and could benefit from revascularization. Evaluating the success of…

…function. Results in loss of consciousness, cessation of breathing, and absence of a palpable pulse. Ventricular contraction has ceased or unable to generate perfusion. SCD…

Cardiology Myocardial ischemia and infarction Definition and Clinical Purpose Myocardial perfusion imaging (MPI) with single photon emission computed tomography (SPECT) or positron emission tomography (PET…

…120 seconds of cardiac arrest and light reactivity is lost when cerebral blood flow ceases. In other words, during prolonged cardiac arrest without effective perfusion…

…impaired ventilation–perfusion matching, increased physiological dead space and the Haldane effect. It is therefore misleading to explain the whole phenomenon as abolition of the…

…This results in flow heterogeneity and perfusion defects in areas supplied by the disease artery. Thus, vasodilators replicate the effects of exercise on coronary arteries…