The core of valves is covered by

ATI LPN

ATI LPN Test Bank

The core of valves is covered by:

A. Endocardium B. Pericardium C. Myocardium D. Smooth muscle

Correct Answer: A

Rationale: The core of heart valves is covered by endocardium, the innermost layer lining the heart.

Which of the following normally cause the cardiac output curve to shift to the left along the right atrial pressure axis?

A. Surgically open chest B. Severe cardiac tamponade C. Breathing against negative pressure D. Positive pressure breathing

Correct Answer: B

Rationale: Severe cardiac tamponade compresses the heart, reducing venous return and shifting the cardiac output curve left.

Type III hyperlipoproteinemia caused by:

A. Lipoprotein lipase deficiency B. Apo CII deficiency C. Apo E deficiency D. Apo B 100

Correct Answer: C

Rationale: Type III hyperlipoproteinemia results from Apo E deficiency, impairing remnant clearance.

What combination of antibiotic is used to treat Viridans streptococci?

A. Penicillin G + Gentamycin B. Aminoglycosides + fluoroquinolones C. Cephalosporins D. Cloxacillin + vancomycin

Correct Answer: A

Rationale: Penicillin G with gentamicin is the standard treatment for Viridans streptococci endocarditis.

Thrombi in heart valves called:

A. Embolus B. Postmortem clot C. Vegetations D. Venous thrombi

Correct Answer: C

Rationale: Thrombi on heart valves are termed vegetations, typical in endocarditis.

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