background: considering suggested formula in the references and pcwp measured by catheterism, in the present study the relation between pulmonary capillary wedge pressure (pcwp) measured the flow velocity of mitral valve and mitral annulus motion through tissue doppler imaging is evaluated methods: 52 cases of severe ms were admitted for balloon mitral valvolotomy (bmv) are included in this stu...

conclusions neither of studied variables was perfect to differentiate cirrhotic patients with and without evs. endoscopy is still the gold standard diagnostic method for diagnosing esophageal varices in patients with cirrhosis. it seems that some of the splenoportal doppler indices are promising, but more research and evaluation is necessary. results forty-four patients were male and 22 female....

background: the goal of this study was to determine the reliability of tcd in evaluation of vertebrobasilar arteries in comparison with brain mra in patients suffering from acute vertebrobasilar stroke. methods: samples were patients with definite clinical diagnosis of vertebrobasilar stroke. for all patients brain mri, mra and tcd were performed during the first 48 hours of admission. basilar ...

background abnormalities in the velocity and pattern of myocardial shortening on tissue doppler imaging (tdi) have been proposed to aid in the noninvasive diagnosis of coronary artery disease (cad). objectives we investigated the diagnostic value of post-systolic shortening (pss), a delayed ejection velocity of the myocardium after the closure of the aortic valve, on tdi in the diagnosis of cad...

Polyphase is a common class of pulse compression waveforms in the radar systems. Oppermann code is one of the used codes with polyphone pattern. After compression, this code has little tolerant against Doppler shift in addition to its high side lobe level. This indicates that the use of Oppermann code is an unsuitable scheme to radars applications. This paper shows that the use of amplitude wei...

A 46-year old man, with the antecedent of lung abscesses in 2003, was diagnosed with alcoholic cirrhosis in 2006, when he developed ascites. In October 2008, he was admitted to hospital again with ascites (ASAG 1.74). Doppler ultrasound revealed extrahepatic and intrahepatic portal vein thrombosis, with patent splenic vein and no collateral vessels nor portal cavernomatosis. It showed also enla...

background: we conducted this prospective study to evaluate the prognostic significance of uterine and ovarian artery doppler velocimetry in clomiphene citrate (cc) cycles. materials and methods: a total of 80 patients with unexplained infertility were given 100 mg/day of cc from day 3 to day 7 of their cycles in this current prospective study. on cycle day 3, before administration of cc, each ...

AIM The study evaluated the applicability of Doppler ultrasonography in predicting the course of pregnancy and neonatal outcome in dichorionic pregnancy complicated by growth discordance. METHODS Doppler examination of the umbilical artery (UA) and middle cerebral artery (MCA) was performed in 106 twins. Abnormal values of the UA pulsatility index (PI) were considered to be above the 95th per...

The purpose of this study is to clarify the natural history of the valvular pulmonary stenosis (PS) from the standpoint of the indication for percutaneous transvenous pulmonary valvuloplasty (PTPV). We retrospectively analyzed age-dependent changes of the peak velocity in the pulmonary artery (peak V) using Doppler echocardiography (Doppler), and some other echocardiographic and clinical findin...

It is well known that GPS C/A codes present cross correlation peak potentially causing false acquisitions. These cross-correlations peaks can in addition cause tracking errors and C/No degradation [1], [2], [3] and [4], not in traditional GPS tracking situations, but for applications where signals are received with low Doppler. There are several applications that can have low relative Doppler, ...