Yazar "Kaya, Mehmet G." seçeneğine göre listele

Listeleniyor 1 - 2 / 2
  • [ X ]
    Öğe
    Evaluation of atrial electromechanical coupling times in hemodialysis patients
    (Blackwell Publishing Inc., 2014) Karavelioğlu, Yusuf; Karapınar, Hekim; Özkurt, Sultan; Sarıkaya, Savaş; Küçükdurmaz, Zekeriya; Arısoy, Arif; Kurt, Recep; Yılmaz, Ahmet; Kaya, Mehmet G.
    BackgroundThere are no definite data about the atrial electromechanical coupling times (AEMCT) in patients with end stage renal failure (ESRF). The aim of this study was to investigate the AEMCT in ESRF patients without hypertension (HT) and diabetes mellitus.MethodsThe study population consisted of 47 normotensive, nondiabetic ESRF patients and 41 healthy age/gender-matched control subjects. The time intervals from the onset of P-wave on the surface electrocardiogram to the beginning of late diastolic A-wave (PA) were obtained from the lateral mitral annulus (PA-lateral, maximum AEMCT), septal annulus (PA-septal), and tricuspid lateral annulus (PA-tricuspid). Time intervals were corrected according to the heart rate. The difference between PA-septal and PA-tricuspid (right AEMCT), PA-lateral and PA-septal (left AEMCT), and PA-lateral and PA-tricuspid (inter AEMCT) were calculated. Corrected time intervals were used for calculations.ResultsGroups were similar for age (52 ± 12.3 vs. 49.9 ± 6 years, P > 0.05) and gender. Maximum (61 ± 20 vs. 47 ± 13 ms; P < 0.001) AEMCT was significantly higher in the patients compared with the control group, but septal and tricuspid EMCT were not different (P > 0.05). Both inter-atrial (37 ± 21 vs. 24 ± 16 ms, P = 0.002) and left atrial (25 ± 18 vs. 12 ± 9 ms; P < 0.001) EMCT were significantly higher in patients when compared with the controls but intra-right atrial EMCT was not different.ConclusionsAtrial conduction parameters such as maximal EMCT, left atrial, and inter-atrial EMCTs were prolonged in ESRF patients. This prolongation is seen in ESRF patients even in the absence of factors that affect atrial coupling, such as HT. © 2013, Wiley Periodicals, Inc.
  • [ X ]
    Öğe
    Evaluation of left ventricular diastolic function in nonhypertensive nondiabetic hemodialysis patients
    (2013) Karavelioğlu, Yusuf; Özkurt, Sultan; Karapınar, Hekim; Küçükdurmaz, Zekeriya; Arısoy, Arif; Kurt, Recep; Yılmaz, Ahmet; Yarlıoğlueş, Mikail; Akpek, Mahmut; Kaya, Mehmet G.
    AIM: Diastolic dysfunction (DD) is common in hemodialysis (HD) patients. Because diabetes mellitus (DM) and hypertension (HT) are also common in this patient group, the exact reason for DD in HD patients is not clear. The present study evaluated left ventricular (LV) diastolic function in HD patients without DM and HT. METHODS: Fifty patients on HD and 34 age-matched and sex-matched healthy control individuals were enrolled. Echocardiography was performed in all participants. LV systolic and diastolic functions were evaluated by B-mode echocardiography, pulsed wave, and tissue Doppler imaging. The HD patients were divided into two groups according to the presence or absence of left ventricular hypertrophy (LVH) in echocardiography. RESULTS: LV dimensions and systolic function were within normal limits and similar between groups. However, the HD patients had significantly worse diastolic function (E/A: 0.78±0.26 vs. 1.19±0.28, P<0.001, e?/a? septal: 0.77±0.36 vs. 1.04±0.21, P<0.001) and increased filling pressure (E/e?: 8.55±3.2 vs. 5.79±1.93, P<0.001). Thirty-one (62%) patients had LVH, whereas 19 (38%) patients did not have LVH. LV systolic and diastolic functions were similar in HD patients with and without LVH. Seventeen (55%) hypertrophies were concentric and 14 (45%) were eccentric. Diastolic functions were similar in patients with either concentric or eccentric hypertrophy. CONCLUSION: Diastolic function is impaired in HD patients even in the absence of diseases that can cause DD such as HT and DM. © 2013 Wolters Kluwer Health | Lippincott Williams & Wilkins.