RCIS(question with complete solution )already passed 2023

RCIS(question with complete solution )already passed 2023Hypaque contrast material is _______ and when injected into the heart causes an immediate _____ in cardiac output. a. Hypertonic, Increase b. Hypertonic, Decrease c. Hypotonic, Increase d. Hypotonic, Decrease - correct answer b. Hypertonic, Decrease What chemical element in contrast material makes it radiopaque to X-rays? a. Calcium b. Iodine c. Barium d. Lead - correct answer b. Iodine Older angiographic contrast agents such as Hypaque or Renografin commonly overload the blood volume of a patient in CHF. New contrast agents such as Ioxaglate (Hexabrix) and Iohexol (Omnipaque) do not increase the preload as much because of their: a. Low osmolarity b. Low Na+ and K+ content c. Higher radio-opacity per cc d. Increased ionization in solution - correct answer a. Low osmolarity A patient's LV angiogram shows apical hypokinesis during sinus rhythm. But following one PVC the compensatory beat shows significantly improved EF. This post-"PVC potentiation" of LV contractility probably indicates: a. Reversible apical ischemia b. Irreversible apical infarcted area c. Recent LAD occlusion