Nokea
Mechanisms of dyspnea in left heart disease include all, except
- A. PVH and decreased lung compliance
- B. Respiratory muscle fatigue
- C. Elevated LV End diastolic pressure leads to decreased antegrade coronary blood flow
- D. Reverse 'Bernheim' effect
Correct Answer: C
Rationale: Elevated LV end-diastolic pressure does not typically lead to decreased antegrade coronary blood flow.
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List FOUR other cardiac manifestations for Marfan’s syndrome, aside from aortopathy.
- A. Mitral valve prolapse/regurgitation
- B. Calcification of the mitral valve <40 years
- C. Dilation of pulmonary artery
- D. Dilation or dissection of ascending/descending aorta (<50 years old)
Correct Answer: A
Rationale: Marfan's syndrome may involve multiple cardiac complications including mitral valve prolapse and other structural heart abnormalities.
The following are true about water excretion:
- A. It is influenced by the proximal tubule
- B. It is influenced by vasopressin
- C. It depends on erythropoietin
- D. It is influenced by the ascending limb of the loop of Henle
Correct Answer: B
Rationale: It is influenced by vasopressin: Vasopressin (ADH) regulates water reabsorption in the kidneys, primarily by acting on the collecting ducts, enhancing water retention in response to dehydration.
List FOUR differential diagnoses aside from aortic coarctation for a two-week old infant presenting with tachypnea and poor femoral pulses.
- A. Tachycardia induced cardiomyopathy
- B. Critical aortic stenosis
- C. Dilated cardiomyopathy
- D. Myocarditis
Correct Answer: A
Rationale: Differential diagnoses in such cases can include non-structural heart conditions like tachycardia induced cardiomyopathy, which affects the heart's ability to pump effectively.
The nurse is caring for a child with a diagnosis of Kawasaki disease. The child’s parent asks the nurse, “How does Kawasaki disease affect my child’s heart and blood vessels?†On what understanding is the nurse’s response based?
- A. Inflammation weakens blood vessels, leading to aneurysm.
- B. Increased lipid levels lead to the development of atherosclerosis.
- C. Untreated disease causes mitral valve stenosis.
- D. Altered blood flow increases cardiac workload with resulting heart failure.
Correct Answer: A
Rationale: Inflammation of vessels weakens the walls of the vessels and often results in aneurysm.
Depending on the frequency and severity of hypercyanotic attacks in tetralogy of Fallot, all the following procedures are true EXCEPT
- A. placement of the infant in the knee-chest position
- B. administration of oxygen
- C. injection of morphine subcutaneously
- D. rapid correction with intravenous sodium bicarbonate
Correct Answer: D
Rationale: Intravenous sodium bicarbonate is not typically used for hypercyanotic attacks.