The nurse discovers a patient receiving warfarin is bleeding.
What drug would the nurse prepare to counteract this drug?

Choice A rationale

Cardiac glycosides are not known for increasing heart rate. Instead, they tend to decrease heart rate by enhancing vagal tone and increasing the refractory period of the atrioventricular node, which helps in controlling heart rate, especially in atrial fibrillation.

Choice B rationale

Cardiac glycosides actually increase the force of myocardial contractions. They inhibit the sodium-potassium ATPase pump, which leads to an increase in intracellular sodium and calcium levels in the myocardial cells, thus increasing the force of contraction.

Choice C rationale

Cardiac glycosides do not significantly decrease conduction velocity. They primarily affect the contractility and heart rate but their influence on conduction velocity is relatively mild.

Choice D rationale

Cardiac glycosides improve renal blood flow and increase urine output by increasing the cardiac output and reducing the activation of the renin-angiotensin-aldosterone system. This helps in relieving symptoms of heart failure.

Choice A rationale

Plaque formation in arteries does not start with platelets and fibrin.

Choice B rationale

Plaque begins with fatty streaks, which are the earliest signs of atherosclerosis and consist of lipid-laden cells in the arterial wall.

Choice C rationale

White blood cells are involved in the inflammatory process of atherosclerosis but do not represent the initial plaque formation.

Choice D rationale

Foam cells, which are lipid-laden macrophages, develop later in the process of plaque formation and contribute to the growth of atherosclerotic lesions. .