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Figure 1. A 42-year-old woman who had a six-year history of breast cancer and bony metastasis, which had been treated with surgery, adjunctive chemotherapy, and radiation to the thoracic spine, presented with a two-week history of progressive dyspnea on exertion and fatigue. Physical examination demonstrated a pulse of 110 beats per minute, with disappearance of the radial pulse with inspiration; blood pressure of 104/62 mm Hg; jugular venous pressure of more than 15 cm of water; clear lungs; and distant heart sounds. The 12-lead electrocardiogram revealed sinus tachycardia with low voltage and electrical alternans (Panel A). Two-dimensional transthoracic echocardiography . . . [Full Text of this Article] |