In planning care for Mrs. B., who has right leg venous occlusion, the position best suited for her would be

Correct Answer: C

Rationale: The correct answer is C: supine with right leg elevated. Elevating the right leg helps reduce swelling and improve venous return, aiding in managing venous occlusion. Elevating the left leg, as in choice D, would not be effective as it does not target the affected leg. Choices A and B do not specifically address the venous occlusion in the right leg. Positioning Mrs. B. supine with the right leg elevated is the most appropriate choice for improving her condition.

Correct Answer: B

Rationale: The correct answer is B: strength of contraction. Digitalis preparations, such as digoxin, increase the strength of myocardial contraction by inhibiting the sodium-potassium ATPase pump, leading to an increase in intracellular calcium levels. This results in a positive inotropic effect, enhancing the force of cardiac muscle contraction. The other choices are incorrect because digitalis preparations do not affect the rate of contraction (choice A), conduction velocity (choice C), or kidney function (choice D).

Correct Answer: B

Rationale: The correct answer is B: Decreased clotting time and PTT. In pulmonary embolism, clotting factors are consumed, resulting in decreased clotting time and prolonged PTT. Elevated WBC and PO2 (A) are nonspecific. Elevated SGOT and LDH (C) suggest heart or liver issues, not PE. Decreased CPK and BUN (D) are not typically associated with PE.

Correct Answer: B

Rationale: The correct answer is B: Fusion of the valve leaflets. Mitral stenosis is characterized by the narrowing of the mitral valve orifice, primarily caused by fusion of the valve leaflets. This fusion restricts the flow of blood from the left atrium to the left ventricle, leading to symptoms such as dyspnea, fatigue, and palpitations. Development of a calcium plate across the orifice (A) is seen in aortic stenosis, not mitral stenosis. Tight ventricular outflow obstruction (C) is characteristic of conditions like hypertrophic cardiomyopathy, not mitral stenosis. Lengthening of the chordae tendineae (D) is not a primary cause of mitral stenosis symptoms.