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Baki Hekimoglu

Publications and source records attributed to Baki Hekimoglu.

8 recordsLinked to original sources
PubMed2006

Computer-assisted intraaneurysmal thrombus visualization.

OBJECTIVE: Improved visualization of intraaneurysmal thrombi can contribute to understanding their impact on clinical courses and treatments. Digital subtraction angiography (DSA) demonstrates the hemodynamic portion of aneurysm domes and vasculature structures and has been considered by many to be the principal technique used for aneurysm diagnosis. An intraaneurysmal thrombus may be visualized as a filling defect on DSA, but DSA does not reliably indicate the presence of an intraaneurysmal thrombus or its details. Computerized tomography (CT) and magnetic resonance (MR) imaging may have advantages over DSA, particularly because of their capacity to visualize soft tissue. Hence, we investigated the reconstruction of MR and CT images and compared it to DSA for assessment of intraaneurysmal thrombi. METHODS: Thirty-one patients with 34 aneurysms were enrolled. The entire group was examined with DSA. Sixteen cases were also examined with MR imaging; the remaining 15 were examined with CT imaging. Images of intraaneurysmal thrombi were rendered from corresponding MRI and soft tissue scans using CT. Intracranial vessels and aneurysms were defined from MR and CT angiography. Whole images were linked via imaging software for the reconstruction of vasculature structures. Images were superimposed to produce visualizations of thrombi situated in aneurysmal bodies. RESULTS: Reconstruction of the MR and CT images clearly demonstrated the presence and details of intraaneurysmal thrombi in 9 (26.4 %) of 34 aneurysms. DSA detected only 4 (11.7 %) of the cases as a filling defect. Significant differences in thrombus visualization were observed between DSA used alone or in conjunction with either MRA (P = .02) or CTA (P = .04) images. Mean volume of thrombosed aneurysms was 3.2 +/- 0.84 mL (mean +/- SEM) and thrombosis volume was 0.9 +/- 0.31 mL. Aneurysm and nested thrombus volumes were highly correlated (r = 0.987; P < .001). CONCLUSION: Intraaneurysmal thrombi were clearly visualized by computerized MR and CT image reconstruction. MR and CT were superior to DSA alone in demonstrating the presence of intra-aneurysmal thrombi. Computer-assisted 3-D visualization can be invaluable in understanding the shape and volume of intraaneurysmal thrombi, which may contribute to more accurate assessment and effective treatment of aneurysms cases.

Adult↗
PubMed2005

Graves' ophthalmopathy: comparison of the Doppler sonography parameters with the clinical activity score.

PURPOSE: Our aim was to compare the Doppler ultrasonography (US) parameters with clinical activity score (CAS) in patients with Graves' ophthalmopathy. METHODS: Blood flow parameters in the ophthalmic artery (OA), superior ophthalmic vein (SOV), central retinal artery (CRA) and central retinal vein (CRV) were measured by Doppler US in 118 patients with Graves' disease in 3 groups (A, B, and C) and 20 control subjects. Group A included 25 patients with CAS value "0"; group B 55 patients with CAS value "1 or 2"; group C 38 patients with CAS value "3 or above." RESULTS: Peak systolic velocities (PSV) and end-diastolic velocities (EDV) in the OA, PSV, and in the CRA calculated for group C were significantly higher than for group A, group B, and the control group. Resistance index in the OA and maximal velocity (MV) in the SOV calculated for group C were significantly lower than those calculated for group A, group B, and the control group. CONCLUSION: Doppler parameters of MV in SOV, PSV and EDV in OA, and PSV in CRA seem to be helpful in the differentiation of active and inactive phases of Graves' ophthalmopathy.

Adult↗
PubMed2004

A rare anomalous origin of right vertebral artery: findings on Doppler sonography.

Anomalous origin of the right vertebral artery from the right common carotid artery occurs rarely. To the best of our knowledge, the medical literature contains no information about gray-scale and Doppler sonography findings in this anomaly, despite the extensive information available from angiographic studies and postmortem examinations. We present the case of a 32-year-old man who suffered from a sudden onset of hemiparesis on the left side. Doppler sonography revealed a partial thrombosis in the proximal part of right common carotid artery. The right vertebral artery was shown to originate from the proximal part of the right common carotid artery. The right vertebral artery was patent. Thus, the use of color Doppler sonography can aid in the diagnosis of some vascular anomalies.

Adult↗
PubMed2004

Evaluation of the early hemodynamic changes in carotid arteries during ventricular and dual chamber pacing.

In spite of a wide choice of pacemakers, there are some problems in making more rational clinical decisions for individual patients since mode selection and programming is usually performed on the basis of a clinical hunch. The aim of this study was to measure the differences in carotid flow in patients with a pacemaker programmed in the dual chamber and in the single chamber pacing modes. Sixty patients with implanted bipolar DDD pacemakers were enrolled in this study. Blood peak systolic velocity (PSV) and end-diastolic velocity (EDV), cross-sectional area, resistive index (RI), and pulsatility index (PI) were measured in the common (CCA), internal (ICA), and external (ECA) carotid arteries before pacemaker implantation and after dual chamber and ventricular pacing at 60 beats/min. PSVs in the left CCA (79.3 +/- 24.9 cm/s) and right CCA (84.1 +/- 18.7) were shown to significantly decrease after VVI pacing (60.1 +/- 16.6 and 62.1 +/- 20.0, respectively). There was also a similar significant decrease in PSV in the left and right ICAs and ECAs. Besides PSV, RI, and PI in the left and right CCAs, ICAs, and ECAs significantly decreased after VVI pacing. There was no similar decrease after DDD pacing. Cross-sectional area and flow volume in the CCA, ICA, and ECA were similar after DDD and VVI pacing and before pacemaker implantation suggesting that cardiac output was similar when the measurements were recorded. Carotid artery PSVs, pulsatility, and RIs were found to be significantly decreased during VVI pacing compared to baseline and DDD pacing. The greater incidence of adverse cerebral outcomes in patients with VVI rather than DDD pacing may be partly due to decreased carotid PSVs.

Arrhythmia, Sinus↗
PubMed2003

Pulmonary function tests and high-resolution CT in the detection of pulmonary involvement in inflammatory bowel disease.

GOALS: To assess the pulmonary involvement detected by pulmonary function tests (PFT) and high-resolution computed tomography (HRCT) in inflammatory bowel disease (IBD) patients and to investigate the relationship of the pulmonary abnormalities with respiratory symptoms and bowel disease activity. METHODS: 23 patients with ulcerative colitis, 13 patients with Crohn disease and 14 control subjects took part in this prospective, controlled study. In all patients, detailed clinical information was obtained and extent and activity of the bowel disease were established. Each patient underwent PFT and HRCT scanning. RESULTS: A pulmonary function abnormality was present in 21 of 36 patients. In IBD patients, DLCO were significantly lower, but RV/TLC was significantly higher than those of controls. HRCT revealed air trapping, fibrosis, emphysema, bronchiectasis and alveolitis in 19 patients. One-third of the patients with PFT abnormality, and 42% of the patients with HRCT abnormality were respiratory symptom free. Approximately 80% of the patients with pulmonary involvement had active bowel disease. CONCLUSIONS: Pulmonary involvement is common in patients with IBD. A high degree of suspicion is necessary to detect the pulmonary abnormality in IBD, because considerably large proportions of the symptom free patients have abnormal findings on HRCT and PFT.

Adult↗
PubMedDate not supplied

Intractable postpartum hemorrhage resulting from uterine artery pseudoaneurysm: superselective arteriographic embolization via the collateral route.

We present a patient with intractable postpartum hemorrhage resulting from uterine artery pseudoaneurysm despite bilateral hypogastric artery ligation who was successfully treated by an endovascular approach via the collateral route. Although there is a good argument for postponing surgery until transcatheter embolization has been attempted, this case shows that embolization can still be successful even if the iliac vessels have been ligated.

Adult↗