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Measurement and mechanism of pulsus paradoxus

Measurement and mechanism of pulsus paradoxus
Doppler echocardiogram in a patient with cardiac tamponade. Note the inspiratory increase of tricuspid flow velocities (A) and the expiratory increase of mitral (B) and aortic (C) flow velocities.
Reproduced from: Hoit BD. Imaging the pericardium. Cardiol Clin 1990; 8:587. Illustration used with the permission of Elsevier Inc. All rights reserved.
Graphic 63439 Version 6.0