Answers |Already Graded A+
At what time during fetal growth is the heart first fully developed? ✔Correct 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? ✔Correct 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?
✔Correct Answer-Sodium
Following electrical depolarization of the myocardial cell membrane, which ion rushes in first, and
which ion rushes in later? ✔Correct Answer-sodium followed by calcium
Which ion helps slow heart muscle contraction? ✔Correct Answer-potassium
In the cardiac cell action potential, what phases are included in the absolute refractory period?
✔Correct Answer-Phases 1 into Phase 3
When contracting against which of the following pressures will the velocity of muscle cell contraction
be most rapid? ✔Correct 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? ✔Correct Answer-the
beat is stronger than a typical beat
All of the following increase preload ✔Correct Answer-MR
AI
Volume Overload
All of the following increase afterload ✔Correct Answer-AS
ASH
HTN
What is the predominant echo finding associated with increase preload? ✔Correct Answer-LV
Dilatation
In a pt with a VSD, which of the following sites will provide a measure of pulmonic flow? ✔Correct
Answer-MV
Which of the following best describes a pt with severe MR? ✔Correct Answer-EF - 55%
RF - 25%
EF - 25%
RF - 50% ***
All are cardiac responses to increased sympathetic stimulation ✔Correct Answer-increased HR
increased contractility
increased irritability