Abstract
A 55-year-old woman with a remote history of Hodgkin's lymphoma treated with mantle-field radiation was admitted with subacute, progressive dyspnea on exertion, which had developed over a period of 2 to 3 weeks. On examination, the blood pressure was 97/59 mm Hg and the respiratory rate 20 breaths per minute. Distention of the jugular veins and elevation of jugular venous pressure during inspiration, known as Kussmaul's sign, were observed (see video). Heart sounds were normal. A pulsus paradoxus was not observed. The lungs were clear on auscultation. A transthoracic echocardiogram showed a thickened pericardium without pericardial effusion. Kussmaul's sign is . . .
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