Air Methods Critical Care Exam Questions and Answers 100% Correct Question : A PaCO2 greater than 45 mmHg indicates:
- Metabolic acidosis.
- Metabolic alkalosis.
- Respiratory acidosis.
- Respiratory alkalosis.
Correct answer: C. Respiratory acidosis
Question : In infants and children, retraction of the skin,
muscles, and other tissues around the clavicle and between
the ribs indicates:
A.shallow breathing.B.labored breathing.C.see-saw breathing.D.
normal breathing.
Correct answer: B.
labored breathing.
Question : Which of the following may be useful in systolic
dysfunction but may be detrimental in diastolic dysfunction?A.β-blockers B.Angiotensin-converting enzyme inhibitors C.Aldosterone antagonists D.Vasodilators
Correct answer: Vasodilators are used for preload and
afterload reduction in systolic dysfunction but may detrimentally decrease diastolic filling in diastolic dysfunction.
Question : Which of the following is a cause of diastolic
dysfunction?A.Cardiac tamponade B.Myocardial infarction C.Hypertension D.Aortic stenosis
Correct answer: Diastolic dysfunction is an inability of the
heart to fill adequately. Tamponade compresses the chambers so that filling is impaired. If filling is impaired, cardiac output is diminished.
Question : Which single lead is the most valuable for the
diagnosis of ventricular tachycardia?A.II B.V1 C.V6
D.III
Correct answer: Because ventricular tachycardia is most
likely to originate in the left ventricle, lead V1, which is normally predominantly negative, would be predominantly positive in ventricular tachycardia.Leads II and III, both inferior leads, are too similar for either to be correct. Because the normal QRS axis is down and to the left, causing a predominantly positive QRS complex in lead V6 but a predominantly negative QRS complex in lead V1, choose lead V1.
Question : On a pulmonary artery waveform, the dicrotic
notch represents closure of which valve?A.Aortic valve B.Pulmonic valve C.Tricuspid valve D.