Which combination of signs is associated with pericardial tamponade?

• A. Hypertension, muffled heart sounds, elevated JVP; pulsus paradoxus.
• B. Hypotension, muffled heart sounds, elevated JVP; not including pulsus paradoxus.
• C. Chest pain with radiation to the left arm.
• D. Hypotension, muffled heart sounds, elevated JVP; pulsus paradoxus.

Answer: (D)

Pericardial tamponade happens when fluid in the pericardial space raises pressure around the heart, making it hard for the heart to fill properly during diastole. That reduced filling lowers the stroke volume and cardiac output, so blood pressure tends to fall (hypotension). At the same time, blood backs up into the superior vena cava, elevating the jugular venous pressure. The heart is also cushioned by fluid, which dampens the sounds heard with a stethoscope (muffled heart sounds). A classic extra sign is pulsus paradoxus, where the systolic blood pressure drops more than about 10 mm Hg during inspiration because the heart’s filling is severely limited by the surrounding fluid.

So the best combination is hypotension with muffled heart sounds, elevated JVP, and pulsus paradoxus, all aligning with tamponade physiology. Chest pain radiating to the left arm points more toward myocardial ischemia, and hypertension contradicts the expected low filling pressures seen in tamponade. Not all patients show pulsus paradoxus, but its presence strongly supports tamponade when other signs are present.