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    A case of Guillain-Barre syndrome following prosthetic valve endocarditis
    (Elsevier Ireland Ltd, 2009) Celik, Turgay; Iyisoy, Atila; Celik, Murat; Baysan, Oben; Bek, Semai; Dogru, M. Tolga
    Guillain-Barre syndrome (GBS) is an acute inflammatory demyelinating polyneuropathy associated with progressive limb weakness and areflexia. Up to now, a few cases of GBS following infective endocarditis (IE), particularly prosthetic valve endocarditis, have been reported. We present a case of a 63-year-old male patient in whom GBS developed following aortic prosthetic valve endocarditis. Although GBS is not frequently encountered in patients with IE, we believe that every clinician should consider the probable GBS in those patients suffering from distal paresthesis, progressive limb weakness and ataxia. (C) 2007 Elsevier Ireland Ltd. All rights reserved.
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    Differences in left ventricular structure, functions and elastance in the patients with normotensive blood pressure
    (Turkish Soc Cardiology, 2008) Dogru, Mehmet Tolga; Tireli, Emine; Gueneri, Mahmut; Iyisoy, Atila; Celik, Turgay
    Objective: We aimed in this study to investigate the differences in left ventricular (LV) structure, function and elastance parameters in the patients with normotensive blood pressure (BP) levels. Methods: A total of 294 normotensive patients (< 140/90 mmHg) (135 males, mean age: 45 +/- 11 years; 159 females, mean age 38 +/- 10 years) were enrolled into the present cross-sectional study. Patients were categorized into three groups according to their BP levels as optimal BP (< 120/80 mmHg), normal BP (120-129 / 80-84 mmHg) and high normal BP (129-139 / 84-89 mmHg) groups. We evaluated LV structure and functions by using Doppler echocardiography in all participants, Afterwards we compared the measurements for revealing the echocardiographic differences among the BP groups. In this study, one-way ANOVA Kruskal-Wallis, one-way ANCOVA and partial correlation analysis tests were used for the statistically evaluation of the data. In addition, relative risk ratios (FIR) were also calculated for determination of the effects of BP levels to echocardiographic parameters. Results: There were significant statistical differences in left atrial diameter(LA) (p=0.002),transmitral A wave velocity (A) (p=0.002), meridional wall stress (MWS) (p < 0.001), pulmonary capillary wedge pressure (PCW) (p=0.029) among BP groups. After the correction of the data for anthropometric measurements, multiple comparisons have shown that only end-systolic (Es) and end-diastolic elastance (Ed) were different between the normal and high-normal BP groups (for Es, p=0.013; for Ed, p=0.007). But it was found that optimal BP group had significant differences in LV structure and function parameters when compared to high normal BP group (for LA, p=0.028; for A, p=0.035; for MWS, p=0.002; for Es, p < 0.001; for Ed, p < 0.001). Besides, increased FIR were detected for increased left atrial diameter index and pulmonary capillary wedge pressure values in high-normal BP group (RR: 1.537, 95% Cl (1.197-1.974), p=0.005 and RR: 1.272, 95% Cl (1.089-1.485), p=0.032, respectively). Conclusion: Pathologic changes in LV due to increasing BP begin at below-hypertensive BP levels. It could be possible that normal BP stage is the beginning level of these changes. (Anadolu Kardiyol Derg 2008; 8: 473-21)
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    QT interval and dispersion differences between normal and prehypertensive patients: effects of autonomic and left ventricular functional and structural changes
    (Aves Yayincilik, 2009) Dogru, Mehmet Tolga; Gueneri, Mahmut; Tireli, Emine; Sahin, Oemer; Celik, Turgay; Iyisoy, Atila
    Objective: We aimed to investigate the effects of autonomic and left ventricular functional and structural changes on QT interval and dispersion differences between normal and prehypertensive patients. Methods: A total of 291 normotensive patients (<140/90 mmHg) (135 males, age range: 16-75 years, mean age: 45 11 years; 156 females, age range: 17-71 years, mean age 38 10 years) were enrolled into this cross-sectional case-controlled study. Patients were categorized into two groups according to their blood pressure (BP) levels as Group 1 - patients with normal BP (<120/80 mmHg) or Group 2 - patients with prehypertensive BP (120-139/80-89 mmHg). We evaluated autonomic states by using heart rate variability measurements. Left ventricular structure and functions were evaluated by using Doppler echocardiography in both normal and prehypertensive BP groups regarding their effect on QT intervals and QT dispersion. Statistical analyses (Student's t and Mann-Whitney U tests) were used to evaluate the differences in QT intervals and QT dispersion between the BP groups. Results: There were statistically significant differences between the two BP groups with respect to QT intervals and QT dispersion (for QT min, p<0.001, QTc min, p<0.001 and QT dispersion, p<0.001). We also detected that prehypertensive patients had increased sympathetic activity and slightly impaired left ventricular systolic and diastolic function (for low frequency power / high frequency power ratio -p=0.029, left ventricular ejection fraction - p=0.054, and transmitral peak A wave velocity - p<0.001). Conclusion: QT interval and dispersion differences are present in prehypertension. Moreover, these differences are independent of left ventricular mass. Autonomic changes can be effective on these differences between the patient groups. (Anadolu Kardiyol Derg 2009; 9: 15-22)