Transthoracic tissue Doppler study of right ventricular regional function in a patient with an arrhythmogenic right ventricular cardiomyopathy A 45 year old man was admitted because of ventricular tachycardia. He was known to suffer from arrhythmogenic right ventricular cardiomyopathy (ARVC). The rhythmic instability was quickly managed with amiodarone and atenolol. During evaluation of the pat...

in this study, trans-pulmonic valvular gradient of 51 patients with congenital pulmonary stenosis measured by cw-doppler and cardiac catheterization were compared to find whether they are comparable and if doppler method is accurate enough for interventional decision-making. results showed that findings in both methods were comparable and doppler method is accurate and enough for clinical decis...

Laser Doppler is a noninvasive, objective, reproducible and painless method for measuring blood flow in tissue microcirculation. This method is based on the Doppler effect, the change in frequency of light reflecting from blood cells in motion. Light from helium-neon laser through optical fibers and probes is directed to the surface of the tissue in which the flow is measured. Light portion is ...

OBJECTIVE The aim of the study was to investigate the effect of intragastric balloon therapy on left ventricular function and left ventricular mass in a cohort of morbidly obese patients. SUBJECTS AND METHODS A prospective trial was performed in a cohort of 17 class II and class III morbidly obese individuals. The intragastric balloon was retained in the stomach for an average of 6 months. Co...

From the flow of a suspension of micrometer-scale carbon particles, the photoacoustic Doppler shift is observed. As predicted theoretically, the observed Doppler shift equals half of that in Doppler ultrasound and does not depend on the direction of laser illumination. This new physical phenomenon provides a basis for developing photoacoustic Doppler flowmetry, which can potentially be used for...

Background Preeclampsia is a specific pregnancy syndrome. Early diagnosis and proper administration of preeclampsia can lead to improved maternal and neonatal outcome. We aimed to investigate the uterine artery Doppler ultrasound in predicting the preeclampsia in women with a high-risk pregnancy. Materials and Methods This analytic study was conducted on 160 primigravida women with gestational...