What is ejection fraction?

Choice A reason: Exudative fluid is not the type of fluid drained from the patient. Exudative fluid is a high-protein fluid that results from inflammation or infection of the pleura. It is usually cloudy and contains white blood cells, bacteria, or blood.

Choice B reason: Purulent fluid is not the type of fluid drained from the patient. Purulent fluid is a thick, yellow-green fluid that results from a bacterial infection of the pleura. It is also known as empyema and contains pus and dead tissue.

Choice C reason: Transudative fluid is the type of fluid drained from the patient. Transudative fluid is a low-protein fluid that results from increased hydrostatic pressure or decreased oncotic pressure in the pleural space. It is usually clear and contains few cells or organisms. It can be caused by conditions such as heart failure, cirrhosis, or nephrotic syndrome.

Choice D reason: Infectious fluid is not the type of fluid drained from the patient. Infectious fluid is a general term that can refer to any fluid that contains microorganisms that cause disease. It can be exudative or purulent, depending on the type and severity of the infection.

Choice A reason: This is not the preferred agent for the initial treatment of heart failure. Vasodilators are a class of medications that lower the blood pressure by relaxing the blood vessels and reducing the resistance to blood flow. They can be used to treat hypertension, angina, and heart failure, but they are usually added to other medications, such as diuretics or beta blockers, to improve the symptoms and outcomes.

Choice B reason: This is the preferred agent for the initial treatment of heart failure. Diuretics are a class of medications that increase the urine output and reduce the fluid retention in the body. They can be used to treat hypertension, edema, and heart failure, as they reduce the preload and afterload on the heart, and decrease the pulmonary congestion and peripheral edema.

Choice C reason: This is not the preferred agent for the initial treatment of heart failure. Calcium channel blockers are a class of medications that lower the blood pressure and heart rate by blocking the calcium channels in the heart and blood vessels, which cause vasodilation and reduced cardiac contractility. They can be used to treat hypertension, angina, and arrhythmias, but they are not recommended for most patients with heart failure, as they may worsen the cardiac function and increase the mortality.

Choice D reason: This is not the preferred agent for the initial treatment of heart failure. Direct renin inhibitors are a class of medications that lower the blood pressure by inhibiting the enzyme renin, which initiates the renin-angiotensin-aldosterone system, a hormonal pathway that regulates the blood pressure and fluid balance. They can be used to treat hypertension, but they have not been proven to be effective or safe for patients with heart failure.