CCI Practice Exam Latest Updated with Complete Solutions

At what time during fetal growth is the heart first fully developed? - ANSWER-40 Days Which of the following L-R shunts is the last to close in the normal post partum period? When does it close? - ANSWER-Patent Foramen Ovale closing at the end of the first week During the resting state, which of the following ions are pumped out of the cells of the myocardium? - ANSWER-Sodium Following electrical depolarization of the myocardial cell membrane, which ion rushes in first, and which ion rushes in later? - ANSWER-sodium followed by calcium Which ion helps slow heart muscle contraction? - ANSWER-potassium In the cardiac cell action potential, what phases are included in the absolute refractory period? - ANSWER-Phases 1 into Phase 3 When contracting against which of the following pressures will the velocity of muscle cell contraction be most rapid? - ANSWER-lowest pressure, the higher the pressure the more that it has to overcome in order to contract What happens to the beat following a premature ventricular depolarization? - ANSWER-the beat is stronger than a typical beat All of the following increase preload - ANSWER-MR AI Volume Overload All of the following increase afterload - ANSWER-AS ASH HTN What is the predominant echo finding associated with increase preload? - ANSWER-LV Dilatation In a pt with a VSD, which of the following sites will provide a measure of pulmonic flow? - ANSWER-MV Which of the following best describes a pt with severe MR? - ANSWER-EF - 55% RF - 25% EF - 25%