Which of the following is a common clinical feature of community-acquired pneumonia?

Correct Answer: D

Rationale: Cough, fever, and pleuritic chest pain are all common clinical features of community-acquired pneumonia, making 'All of the above' the correct answer.

Correct Answer: B

Rationale: The common manifestation of all forms of heart failure is the failure of the heart to pump blood adequately. The clinical presentation may differ depending on which ventricle fails (left or right, or both). Poor diastolic filling is not seen in all forms of heart failure. Pulmonary edema is seen in left-sided failure. Tissue ischemia is directly related to myocardial infarction, which may induce heart failure.

Correct Answer: A

Rationale: The most common causes of heart failure are myocardial ischemia from coronary artery disease, followed by hypertension. Dilated cardiomyopathy is less common cause of heart failure. A high-fat diet can contribute to coronary artery disease, which is a contributor to heart failure, but a high-fat diet is not one of the most common causes of heart failure.

Correct Answer: B

Rationale: Assisting slowly (B) prevents orthostatic hypotension, a risk with vasodilators like Hydralazine and Isordil, especially with edema.

Correct Answer: C

Rationale: The fluid in the pericardial cavity, produced by the serous pericardium, lubricates the heart, reducing friction as it contracts and expands.