Correct Answer: D

Rationale: In younger patients, pericarditis is typically caused by an infection commonly triggered by viruses like the Coxsackie virus, streptococcus, staphylococcus, or Haemophilus influenzae. Infectious processes are the leading cause of pericarditis in younger individuals. Heart failure, Acute MI, and Hypertension are not common causes of pericarditis in young patients. In older adults, acute myocardial infarction (MI) is a more common cause of pericarditis.

Correct Answer: D

Rationale: The correct answer is 'I have ringing in my ears.' Ringing in the ears is a severe adverse effect of Naproxen, indicating potential toxicity. This symptom warrants immediate medical attention. Choices A, B, and C are less concerning and do not directly indicate a severe adverse effect or toxicity related to Naproxen. Upset stomach, mild back pain, and occasional headaches are common side effects that may not require immediate physician contact.

Correct Answer: C

Rationale: A systolic blood pressure of 145 mm Hg falls within the range of 140-159 mm Hg, which is classified as Stage I hypertension. Normotensive individuals have a systolic blood pressure less than 120 mm Hg, making choice A incorrect. Prehypertension is characterized by a systolic blood pressure ranging from 120-139 mm Hg, excluding choice B. Stage II hypertension is diagnosed when the systolic blood pressure is greater than 160 mm Hg, making choice D incorrect. Therefore, the correct classification for a systolic blood pressure of 145 mm Hg is Stage I hypertension.

Correct Answer: A

Rationale: Diabetic patients are more prone to infection than other people without this chronic disorder. Diabetes weakens the immune system and impairs the body's ability to fight off infections, making individuals with diabetes more susceptible to various types of infections. Increased oxygen saturation, low fibrinogen, and constipation are not directly related to diabetes or the increased infection risk associated with the condition. Increased oxygen saturation is actually a positive health indicator, low fibrinogen levels are not a common issue in diabetes, and constipation is not a primary concern when comparing diabetic patients to others without the condition.

Correct Answer: D

Rationale: In lactose intolerance, the inability to digest lactose, the sugar in dairy products, can lead to calcium deficiency if dairy products are removed from the diet. Calcium is crucial for bone health and other bodily functions, so alternative calcium sources like fortified non-dairy milks or leafy greens must be included to prevent deficiency. While fats and proteins are important nutrients, they are not typically deficient in lactose intolerance. Zinc, although an essential mineral, is not the primary concern in this case.