CCI Practice Exam Graded A+

CCI Practice Exam Graded A+ At what time during fetal growth is the heart first fully developed? 40 Days Which of the following L-R shunts is the last to close in the normal post partum period? When does it close? 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? Sodium Following electrical depolarization of the myocardial cell membrane, which ion rushes in first, and which ion rushes in later? sodium followed by calcium Which ion helps slow heart muscle contraction? potassium In the cardiac cell action potential, what phases are included in the absolute refractory period? Phases 1 into Phase 3 When contracting against which of the following pressures will the velocity of muscle cell contraction be most rapid? 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? the beat is stronger than a typical beat All of the following increase preload MR AI Volume Overload All of the following increase afterload AS ASH HTN What is the predominant echo finding associated with increase preload? LV Dilatation In a pt with a VSD, which of the following sites will provide a measure of pulmonic flow? MV Which of the following best describes a pt with severe MR? EF - 55% RF - 25% EF - 25% RF - 50% *** All are cardiac responses to increased sympathetic stimulation increased HR increased contractility increased irritability During the cardiac cycle, which valve most closely follows the T wave on the ECG? AV closure Which flow pattern is most likely to be the longest? PI What is the normal O2 saturation of blood in the pulmonary artery? 75% Where is oxygen saturation of blood the lowest? coronary sinus During systole, the aortic and LV pressures are quite different. What is this finding indicative of? AS During diastole, the RA pressure is much higher than RV pressure. What does this indicate? TS A pt has an ECG with five premature ventricular contractions in succession. What is this called? ventricular tachycardia What is the minimum length of time that echo records need to be kept? 7 years