To examine whether CBF can be imaged by color Doppler technique, we visualized CBF using a transesophageal color Doppler imaging system. In 36 of 39 patients with normal coronary arteriograms after heart surgery, the LMT and the proximal Color doppler flow imaging pdf were clearly imaged by 2-dimensional echocardiography.
Among them, CBF was coded mainly in blue in 32 patients, showing that the flow runs from proximal to distal. The fast Fourier transformation spectrogram of the pulsed Doppler sampled in the colored flow showed a typical flow velocity pattern of the LAD, which mainly consisted of a predominantly diastolic component. These results indicate that the transesophageal color Doppler technique is advantageous in noninvasively imaging CBF. It should be further sought whether flow abnormality due to coronary stenosis could be determined by this technique.
Check if you have access through your login credentials or your institution. This work was supported by grants-in-aid from the Ministry of Health and Welfare, and the Ministry of Education, Science and Culture of Japan. 1989 The American College of Chest Physicians. Twenty-two patients with severe mitral regurgitation were observed to have turbulent systolic antegrade flow on pulsed Doppler mapping of the left atrium. All were studied by color flow imaging to delineate the mechanism of this peculiar flow.
Pulsed Doppler findings of an eccentric regurgitant flow in one side, an antegrade systolic flow with slightly delayed onset in the other side, and a low velocity flow near the posterior wall, were consistant with the theory of a large eccentric regurgitant jet swirling in the left atrium. Color flow imaging confirmed this mechanism in all patients. The other three patients had deformed rheumatic mitral valve. The severity of mitral regurgitation was confirmed in all 16 patients studied by left ventricular cineangiography. We have shown that the antegrade systolic left a trial flow is the result of the swirling of a large regurgitant eccentric jet, is commonly observed with flail mitral valve, can occur in patients with deformed rheumatic mitral valve without flail leaflet, and most significantly indicates the presence of severe mitral regurgitation. 1989 American Society of Echocardiography. These relatively quick and inexpensive tests are growing in popularity.
The equipment used for these tests is becoming increasingly portable, making it possible for a clinician to travel to a hospital, to a doctor’s office, or to a nursing home for both inpatient and outpatient studies. Two methods of recording may be used for this procedure. The second method of recording uses only the second probe function, relying instead on the training and experience of the clinician in finding the correct vessels. Current TCD machines always allow both methods. The echoes are analysed and converted into velocities that are displayed on the unit’s computer monitor.