Yoko Ishiguro

  • Citations Per Year
Learn More
A study of 82 normal and 60 compromised pregnant women who were identified by uterine artery Doppler flow waveform systolic/diastolic ratio >95th percentile (increased peripheral resistance) was carried out to examine the elastic properties of the maternal abdominal aorta (AA). An aortic stiffness index (SI) was measured between 18 and 40 weeks at(More)
This study investigated the clinical significance of abnormally high signal intensity in the left ventricular myocardium on gadolinium-diethylenetriamine pentaacetic acid (Gd-DTPA) enhanced magnetic resonance (MR) imaging in patients with dilated cardiomyopathy. Gd-DTPA enhanced MR imaging, Tl-201 myocardial single photon emission computed tomography(More)
BACKGROUND The diameter pulse waveforms (DPWs) are known to reflect the pressure waveforms at the target vessel. Our purpose was to clarify the usefulness of DPWs recorded noninvasively from the fetal inferior vena cava (IVC) for detecting cardiac function. METHODS A paired ultrasonic phase-locked echo tracking system was used to follow the movement of(More)
BACKGROUND Quantitative information about the elastic properties of the large arteries can be obtained by determination of the pressure and the pulsatile changes of arterial diameter. OBJECTIVE To study the stiffness of major branches (common carotid artery; CCA, abdominal aorta; AA and femoral artery; FA) in newborn infants. STUDY DESIGN The arterial(More)
The usefulness of low-cost, three-dimensional (3D) images reconstructed from magnetic resonance (MR) imaging for investigating persistent left superior vena cava was assessed and compared to the diagnostic accuracy of chest radiography. MR imaging by the spin-echo technique and MR angiography were performed in 10 patients with this anomaly diagnosed(More)
OBJECTIVES To study the diameter pulse waveforms (DPWs) recorded noninvasively from the fetal inferior vena cava (IVC) in human fetuses. METHODS We studied 90 normal fetuses (20 to 40 weeks), ten fetuses with abnormalities of cardiac structure, and seven fetuses with arrhythmia. A paired ultrasonic phase-locked echo tracking system was used to follow the(More)
  • 1