Canadian Journal of Cardiology

Exertional Dyspnea and Chronotropic Incompetence Caused by Extrinsic Compression of the Right Carotid Body by a Giant Lipoma

      A previously fit 76-year-old man presented with 2 years of exertional dyspnea. A 10-cm mass obscured his right carotid pulse. A computed tomography (CT) scan showed an enlarging lipoma in the right carotid space. Cardiopulmonary exercise testing (CPET) showed impaired aerobic capacity and chronotropic incompetence (CI). With lipoma resection, he recovered his exercise capacity, and CPET confirmed improvement in CI and aerobic metabolism. His CI and exertional dyspnea likely reflected compressive baroceptor activation caused by a carotid-space lipoma.
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