Biomedical subjects

Sennur Unal

Publications and source records attributed to Sennur Unal.

4 recordsLinked to original sources

PubMed2005

Discrimination between physiologic and pathologic left ventricular dilatation.

The identification of certain cardiovascular disease in athletes may constitute the basis for disqualification from competition in an effort to minimize the risk of sudden cardiac death. The aim of this study was to assess diastolic and systolic parameters measured by tissue Doppler imaging in endurance veteran athletes who had prominent cardiac dilatation and patients with idiopathic dilated cardiomyopathy in order to determine whether these variables might differentiate each other.

Adult↗

PubMed2004

Functional results in aortic root enlargement.

BACKGROUND: The hemodynamically efficient valves with effective orifice areas that are used in aortic valve replacement have been positively determined to affect postoperative exercise capacity. The aim of this study was to evaluate the functional effects of aortic root enlargement in the late postoperative period for patients with a small effective orifice area. METHODS: Nineteen patients with a small effective orifice area were included in the study. The study group comprised 9 patients who underwent isolated aortic valve replacement with 23-mm St. Jude Medical prosthetic valves and posterior aortic root enlargement. The control group comprised 10 patients in whom 19-mm and 21-mm St. Jude Medical prosthetic valves were implanted without aortic root enlargement. The patients were evaluated in the late postoperative period with echocardiography and cardiopulmonary exercise testing. RESULTS: The 2 groups were similar in anthropometric parameter values, follow-up periods, echocardiographic findings, and the gradients at the prosthetic aortic valve at rest; however, the anaerobic threshold, peak oxygen uptake, minute ventilation volume, and walk time were significantly higher in the study group ( P <.05). CONCLUSION: The choice of aortic root enlargement for the implantation of a valve with a larger effective orifice area is preferred by most of the surgeons over the implantation of a valve with a smaller effective orifice area. The late postoperative functional capacity of the patient is significantly improved with root enlargement. Surgeons should be encouraged to perform root enlargement in patients with a small effective orifice area, and such surgery may even be performed routinely in these patients.

Adult↗

PubMed2002

[The prediction of pulmonary artery systolic pressure and vascular resistance by using tricuspid annular tissue Doppler imaging].

OBJECTIVE: This study was planned to determine pulmonary artery pressure and pulmonary vascular resistance by using tricuspid annular tissue Doppler imaging in patients with valvular and congenital heart disease. METHODS: The study group consisted of patients with valvular and congenital heart disease (n=28). Healthy volunteers (n=10) were included into the control group. Systolic (Sm), early (Em) and late diastolic velocity (Am), isovolumetric relaxation time (IVRTm) were measured from tricuspid annulus by tissue Doppler imaging. Patients of the study group underwent cardiac catheterization and right atrial mean pressure, right ventricle and pulmonary artery systolic- diastolic pressures (PASP and PADP), and pulmonary capillary wedge pressure (PVR, dyn/s/cm-5) were obtained. RESULTS: There were no significant differences between the groups according to age, gender, left and right ventricle ejection fraction, tricuspid annular Sm, Em and Am velocities and velocity- time integrales (p>0.05). IVRTm was increased in the study group (73.75+/-3.1 ms, p<0.05). For Sm velocities of 11 cm/sec, prediction of PASP >/=30 mmHg was calculated with specificity of 57%, sensitivity of 93%, positive predictive value of 88%, negative predictive value of 68% and accuracy of 75%. For Sm velocities - time integral value of 2.7 cm/sec, prediction of the PVR >/=65 dyn/s/cm-5 was estimated with sensitivity of 88%, specificity of 36%, positive predictive value of 68%, negative predictive value of 66% and accuracy of 68 %. CONCLUSION: Pulmonary artery pressure and pulmonary vascular resistance in patients with valvular and congenital heart disease can be predicted by using the Sm wave parameters detected with tricuspid annular tissue Doppler imaging.

Echocardiography, Doppler, Pulsed↗

PubMedDate not supplied

Cardiac troponin I increase after successful percutaneous coronary angioplasty: predictors and long-term prognostic value.

After successful percutaneous coronary interventions (PCI), elevations of cardiac enzymes are not rare, but it is still not clear whether those elevations are associated with adverse late outcome. The purpose of the study was to investigate the relation between cardiac troponin I (cTn-I) increase after successful percutaneous intervention and late outcome. The study consisted of 100 consecutive patients (mean age 56 +/-9.8, 84% male) who had successful elective coronary balloon angioplasty with or without stent implantation. Patients with stable angina (n=54) and unstable angina (n=46) were included in the study. Blood samples for measurement of cTn-I were taken before and immediately after the procedure, and every 6 hours for the first 24 hours. Patients with preprocedural cTn-I elevation were excluded from the study. Postprocedural cTn-I elevation was detected in 34 patients (34%, troponin (+) group) and cTn-I levels were normal in 66 patients (66%, troponin (-) group). Logistic regression analysis showed that intervention in patients with unstable angina, stent implantation following balloon dilation, and maximal inflation pressure were the predictors of cTn-I elevation (p=0.035, p=0.038, and p=0.014, respectively). During the prospective follow-up period for 21 +/-7.5 months, the incidence of major cardiac events including recurrent angina, acute myocardial infarction, death, and revascularization were not different in patients with and without cTn-I elevation. Overall, major cardiac events occurred in 9 patients (26%) in the troponin (+) group and in 13 patients (20%) in the troponin (-) group. Kaplan-Meier survival analysis showed that cTn-I elevation was not an important correlate of overall cardiac events (log-rank: 1.66, p=0.19). The authors conclude that postprocedural cTn-I elevation is related to unstable angina, stent implantation following predilation, and inflation pressure, and there is no association with minor myocardial injury occurring after successful percutaneous coronary intervention and late adverse cardiac events.

Angina Pectoris↗