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    Aortico-left ventricular fistula associated with infective endocarditis [İnfektif endokardit ile birlikte görülen aort-sol ventrikül arasi fistül]
    (2010) Özdemir K.; Do?an U.; Narin C.; Paksoy Y.; Yeniterzi M.; Göktekin O.
    [Abstract not Available]
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    Predictive value of lead aVR for lesions in the proximal portion of the left anterior descending coronary artery [Sol ön inen arter proksimal lezyonlarinin saptanmasinda aVR derivasyonunun de?eri]
    (2006) Aygül N.; Özdemir K.; Tokaç M.; Aydin M.Ü.; Vatankulu M.A.
    Objectives: We aimed to investigate the predictive value of lead aVR in the evaluation of electrocardiograms (ECG) for lesions in the proximal portion of the left anterior descending (LAD) coronary artery. Study design: The study consisted of 361 patients (293 males, 68 females; mean age 58±10 years; range 24 to 84 years) with acute myocardial infarction (AMI), who presented with typical chest pain and ST elevation on ECG. All of the patients underwent coronary angiography (CAG) in order to identify the infarct-related artery (IRA) and its segments. Changes in the ST segment (i.e. elevation or depression) were evaluated in all leads including aVR. The patients were divided into two groups according to the ST elevation recorded in lead aVR, namely as positive (?0.5 mm) or negative (<0.5 mm). Results: The IRA segment was in the proximal LAD in 54% of the aVR positive group, and in 9% of the aVR negative group (p<0.001). Multiple vessel coronary artery disease was more common in the aVR positive group (p<0.001). There was a weak correlation between ST segment elevations in lead aVR and the Gensini score (r=0.21, p=0.002). In patients with anterior AMI, ST elevation in lead aVR predicted the IRA segment in the proximal LAD with 47% sensitivity, 91% specificity, 81% negative predictive value, 68% positive predictive value, and 78% diagnostic accuracy. Conclusion: In patients with anterior AMI, evaluation of aVR lead may be useful in localizing the IRA segment in the proximal LAD and predicting that an increased amount of myocardial tissue is at risk.
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    The role of tissue Doppler echocardiography in the evaluation of functional capacity of patients with heart failure [Kalp yetersizli?i olan hastalarda fonksiyonel kapasitenin de?erlendirilmesinde doku Doppler ekokardiyografinin rolü]
    (2008) Düzenli M.A.; Özdemir K.; Aygül N.; Zengin K.; Gök H.
    Objectives: We investigated correlations between the New York Heart Association (NYHA) functional classification system, which is commonly used to asses functional capacity, and conventional echocardiographic and tissue Doppler echocardiographic (TDE) parameters in patients with heart failure (HF). Study design: The study included 122 patients (31 females, 91 males; mean age 59±11 years) with HF, whose left ventricular (LV) ejection fraction (EF) was less than 50%. The patients were evaluated in two groups based on the NYHA class I-II (n=79; mean age 58 years) and class III-IV (n=43; mean age 61 years). Correlations were sought between the functional status and standard two-dimensional echocardiographic and TDE parameters. Results: The NYHA class showed significant inverse correlations with LV EF, LV stroke volume, mitral deceleration time of early filling, and flow propagation velocity (Vp), and significant positive correlations with end-systolic and enddiastolic diameters and volumes, pulmonary artery pressure (PAP), and the E/Vp ratio. Mitral early (E) and late (A) diastolic peak velocities and the E/A ratio were not correlated. Concerning TDE parameters, the NYHA class was in significant inverse correlation with systolic (Sm), early (Em) and late (Am) diastolic myocardial velocities, and in positive correlation with the E/Em ratio, whereas no correlation was found with the Em/Am ratio. Linear regression analysis showed that Sm, EF, and PAP were independent variables of functional capacity (?=-0.33, p<0.005; ?=-0.26, p<0.05; ?=0.23, p<0.05, respectively). Conclusion: There is significant relationship between myocardial velocities and functional capacity, and Sm, in particular, has the strongest association compared to conventional echocardiographic and other TDE parameters.