CHS Diagnosis and Evaluation 1 — Questions and Answers
Question 1: Which method is considered the gold standard for diagnosing hypertension?
- Office blood pressure measurement
- Home blood pressure monitoring
- Ambulatory blood pressure monitoring (Correct answer)
- Manual pulse palpation
Correct answer: Ambulatory blood pressure monitoring
Ambulatory blood pressure monitoring (ABPM) is considered the gold standard for diagnosing hypertension because it provides multiple blood pressure readings over a 24-hour period, both during activity and sleep. This method offers a more accurate representation of a patient's typical blood pressure, helps identify "white-coat hypertension" or "masked hypertension," and correlates better with cardiovascular outcomes than single office measurements.
Question 2: What is the diagnostic threshold for hypertension based on office BP readings?
- ≥120/80 mmHg
- ≥130/80 mmHg (Correct answer)
- ≥140/90 mmHg
- ≥150/95 mmHg
Correct answer: ≥130/80 mmHg
According to current guidelines from organizations like the American Heart Association (AHA) and American College of Cardiology (ACC), hypertension is diagnosed when a person consistently has office blood pressure readings of ≥130 mmHg systolic or ≥80 mmHg diastolic. This threshold was lowered from previous guidelines to identify and manage elevated blood pressure earlier, reducing the risk of cardiovascular disease.
Question 3: Which laboratory test helps evaluate for secondary hypertension due to kidney dysfunction?
- Serum sodium
- Fasting glucose
- Serum creatinine (Correct answer)
- Lipid panel
Correct answer: Serum creatinine
Serum creatinine is a crucial laboratory test for evaluating kidney function, as it measures a waste product filtered by the kidneys. Elevated creatinine levels indicate impaired kidney function, which is a common cause of secondary hypertension due to the kidneys' role in regulating blood pressure through fluid balance and hormone production.
Question 4: Which imaging study is useful for evaluating renal artery stenosis?
- Echocardiogram
- Renal ultrasound
- Renal duplex Doppler (Correct answer)
- Chest X-ray
Correct answer: Renal duplex Doppler
Renal duplex Doppler is an ultrasound-based imaging study that specifically assesses blood flow in the renal arteries. It is highly effective in detecting narrowing (stenosis) of these arteries, which is a common cause of secondary hypertension by reducing blood flow to the kidneys.
Question 5: Which of the following is a common cause of secondary hypertension?
- Essential hypertension
- Primary aldosteronism (Correct answer)
- Obesity
- Smoking
Correct answer: Primary aldosteronism
Primary aldosteronism is a common endocrine cause of secondary hypertension, characterized by excessive production of aldosterone by the adrenal glands. This excess hormone leads to increased sodium reabsorption and potassium excretion, resulting in fluid retention and elevated blood pressure independent of the renin-angiotensin system.
Question 6: Which physical exam finding may indicate end-organ damage in hypertension?
- Skin pallor
- Enlarged tonsils
- Hypertensive retinopathy (Correct answer)
- Thyroid nodule
Correct answer: Hypertensive retinopathy
Hypertensive retinopathy refers to damage to the blood vessels in the retina caused by prolonged high blood pressure. This finding on a fundoscopic exam is a direct visual indicator of end-organ damage, specifically affecting the microvasculature, and reflects the systemic impact of uncontrolled hypertension.
CHS Diagnosis and Evaluation 1
Which method is considered the gold standard for diagnosing hypertension?