Key result
Pericardial effusion and tamponade were consistently associated with marked phasic changes in color Doppler mitral flow characteristics compared to minimal fluctuations in normal controls.
Why the study?
Do M-mode and two-dimensional color Doppler imaging detect phasic changes in mitral valve flow in patients with cardiac tamponade compared to normal controls?
Case-Control (n=18)
Do M-mode and two-dimensional color Doppler imaging detect phasic changes in mitral valve flow in patients with cardiac tamponade compared to normal controls?
Large phasic fluctuations in color Doppler mitral flow on M-mode and 2D imaging can serve as an echocardiographic sign of cardiac tamponade.
Phasic mitral flow changes on Doppler may aid tamponade detection; leaves open diagnostic accuracy versus standard signs.
We studied the M‐mode and two‐dimensional imaging of color Doppler mitral flow in eight patients with pericardial effusion and tamponade, and in ten control subjects. Pulsed‐Doppler recordings of mitral flow were also obtained in all. Marked phasic changes (presumably respiratory) were consistently recorded in all patients with tamponade with respect to brightness, hue, width (duration), and length of the M‐mode Doppler color stream; in these patients, phasic changes were noted in width, length, and color of the mitral flow stream on the two‐dimensionalechocardiographic recording, with reciprocal changes in tricuspid flow. In the normal subjects, only minimal fluctuations in these color Doppler characteristics were present. Phasic differences in flow velocity of mitral flow by pulsed Doppler were found between the tamponade and the control groups. Large phasic fluctuations in various characteristics of color Doppler mitral flow on M‐mode and two‐dimensional imaging may constitute yet another echocardiographic sign of tamponade. (ECHOCARDIOGRAPHY, Volume 8, September 1991)
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Saxena et al. (1991) conducted a case-control in Pericardial effusion and tamponade (n=18). Pericardial effusion and tamponade vs. Normal control subjects was evaluated on Phasic changes in color Doppler mitral flow characteristics. Pericardial effusion and tamponade were consistently associated with marked phasic changes in color Doppler mitral flow characteristics compared to minimal fluctuations in normal controls.
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