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Difficulty: MediumPhysical Examination Findings

A 48-year-old man who recently emigrated from Southeast Asia presents to the clinic complaining of progressive abdominal swelling, bilateral ankle swelling, and generalized fatigue over the past 4 months. He recalls having a chronic cough and night sweats a few years ago that resolved without formal medical treatment. His temperature is 37.1∘C37.1^{\circ}\text{C} (98.8∘F98.8^{\circ}\text{F}), blood pressure is 118/78 mm Hg118/78\text{ mm Hg}, and pulse is 88 /min88\text{ /min}. On physical examination, the jugular veins are distended to 11 cm H2O11\text{ cm H}_2\text{O} while the patient is sitting at a 45∘45^{\circ} angle. The jugular venous pressure paradoxically increases during deep inspiration. Careful inspection of the neck veins reveals a rapid, deep yy descent. Cardiac auscultation reveals a high-pitched, early diastolic sound heard best at the left sternal border. The lungs are clear to auscultation bilaterally. Abdominal examination demonstrates shifting dullness. Which of the following is the most likely diagnosis?

  1. A
    Cardiac tamponade
  2. B
    Cor pulmonale
  3. Constrictive pericarditisAnswer
  4. D
    Restrictive cardiomyopathy
  5. E
    Severe tricuspid regurgitation

Answer

Constrictive pericarditis
The correct answer is constrictive pericarditis. This condition, often caused by tuberculosis in endemic areas, creates a rigid, fibrotic pericardial shell. This noncompliant casing prevents the right heart from accommodating the normal increase in venous return during inspiration, resulting in a paradoxical rise in jugular venous pressure (Kussmaul sign). During early diastole, ventricular filling is exceptionally rapid (producing a deep, steep yy descent on the JVP tracing) until the expanding ventricle hits the rigid pericardium. This sudden halt in filling produces a characteristic high-pitched, early diastolic sound known as a pericardial knock.

Step-by-Step Solution

1
Identify the clinical syndrome from the patient's presentation.
The patient has signs of severe right-sided heart failure (elevated jugular venous pressure, ascites, peripheral edema) with a history suggesting prior untreated tuberculosis.
Establishing the broad syndromic category narrows the differential diagnosis to causes of right heart failure.
2
Analyze the specific jugular venous pulse (JVP) findings.
The paradoxical rise in JVP with inspiration is Kussmaul sign. The rapid, deep yy descent is Friedreich sign. Both point to restricted right ventricular filling.
Specific JVP waveforms differentiate between pericardial, myocardial, and valvular causes of right heart failure.
3
Interpret the cardiac auscultation findings.
The high-pitched, early diastolic sound is a pericardial knock, characteristic of rapid ventricular filling abruptly halting against a rigid, scarred pericardium.
The timing and pitch of the extra heart sound help differentiate between constriction (knock) and restriction (S3S_3 or S4S_4).
4
Synthesize the findings to establish the diagnosis.
The combination of Kussmaul sign, a rapid yy descent, and a pericardial knock in a patient from an endemic area with probable prior tuberculosis firmly diagnoses constrictive pericarditis.
Combining multiple distinct physical examination findings prevents premature diagnostic closure on similar mimicking conditions.

Key Concept

The classic physical examination findings for constrictive pericarditis include an elevated jugular venous pressure that rises with inspiration (Kussmaul sign), a prominent and rapid yy descent (Friedreich sign), and a high-pitched early diastolic sound (pericardial knock).
Estimated Time:1m 30s
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Physical Examination Findings

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