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A 2D Echocardiogram: Subxiphoid view showing pericardial fluid with right ventricular collapse consistent with cardiac tamponade (arrow); B Doppler echocardiography: variation in mitral peak E velocity more than 25–40% with inspiration; C 2D Echocardiogram: Subxiphoid view showing no pericardial effusion (arrow); D Doppler echocardiography: mitral peak velocity without abnormal variation
