Home About us Contact
|
Home About us Contact | ||
|
|
||
E Velocity (e + velocity)
Selected AbstractsSubtle Systolic Dysfunction May Be Associated with the Tendency to Develop Diastolic Heart Failure in Patients with Preserved Left Ventricular Ejection FractionECHOCARDIOGRAPHY, Issue 4 2009Hüseyin Sürücü M.D. Background: We looked for an answer to the question of whether diastolic heart failure (DHF) is a reality or all heart failures are systolic. Method: 300 cases (hypertensive, aged, obese, etc.), not being diagnosed DHF, with preserved left ventricular (LV) ejection fraction (EF) but having the tendency to develop DHF in future were examined. One hundred and eighty cases without exclusion criteria were selected. Cases were assigned to three groups according to noninvasively obtained pulmonary capillary wedge pressure (PCWP). Results: In cases with higher PCWP (>10 mmHg), transmitral A velocity was increased (P < 0.001) and among the pulsed wave tissue Doppler imaging (pw-TDI) parameters Ea velocity was decreased (P < 0.001) and Ea-dt was prolonged (P < 0.005). In cases with lower PCWP (<8 mmHg), transmitral E velocity was higher (P< 0.001). Furthermore, a more meaningful relationship was found between PCWP and systolic pw-TDI parameters. In all the groups, it was observed that Sa velocity was progressively decreased and Q-Sa interval was progressively prolonged as PCWP increased (for all the groups P < 0.046). Conclusion: The question whether DHF is a reality or all heart failures are systolic may be answered as follows. Subtle systolic dysfunction may be associated with the tendency to develop DHF in patients with preserved LV ejection fraction. As in systolic heart failure (EF < 45%), in patients with preserved systolic function (EF , 45%), systolic and diastolic functions may impair together. The pw-TDI method may be more sensitive than standard echocardiography parameters in detection of systolic dysfunction in cases with preserved EF. [source] Evaluation of Left Ventricular Diastolic Function after Edge-to-Edge Mitral Valve PlastyJOURNAL OF CARDIAC SURGERY, Issue 1 2010Yong-Qiang Lai M.D. This procedure anchors the correspondence leaflets to create a double-orifice mitral valve. The original mitral valve anatomy is changed, and the opening of mitral valve is restricted. Little is known whether this procedure affects the left ventricular diastolic function. Methods: Thirty patients with mitral regurgitation were included in this study. Fifteen with posterior leaflet prolapse received quadrangular resection (group 1), 15 with anterior or bileaflet prolapse underwent edge-to-edge procedure (group 2). Acute hemodynamics was monitored with a Swan-Ganz catheter (Edwards Lifesciences LLC, Irvine, CA, USA). Left ventricular diastolic function was also evaluated with echocardiography in 28 patients with sinus rhythm. The ratio of peak E velocity and A velocity (E/A), the ratio of early diastolic peak flow velocity to early diastolic mitral annular movement velocity (E/Em), and the ratio of early diastolic mitral annular velocity to late diastolic mitral annular velocity (Em/Am) were measured before operation and one week after operation. Results: Mitral valve area and mitral regurgitate grade decreased significantly after operation. There was no significant change in pulmonary artery wedge pressure between two groups and in each group before and after operation. Echocardiography evaluation showed there was no significant difference in E/A, E/Em, and Em/Am before and after operation between two groups and in each group. Conclusion: Edge-to-edge mitral valve plasty procedure has no significant impairment on left ventricular diastolic function. A double-orifice mitral valve has similar hemodynamic behavior with a physiological valve.(J Card Surg 2010;25:5-8) [source] Tissue Doppler echocardiographic assessment of cardiac function in children with bronchial asthmaPEDIATRICS INTERNATIONAL, Issue 6 2007CENAP ZEYBEK Abstract Background: The aim of the present study was to evaluate the role of tissue Doppler echocardiography in assessment of ventricular function in pediatric patients with bronchial asthma (BA). Patients and methods: Fifty-one pediatric patients with BA and 30 age- and sex-matched healthy subjects were studied. BA patients were divided into two groups: mild BA (n = 33) and moderate to severe BA (n = 18). All subjects were examined on conventional and tissue Doppler echocardiography, and 44 patients had pulmonary function tests on spirometry within 1 week of echocardiographic examination. Results: Conventional echocardiographic parameters were all similar in mild asthmatic patients and control subjects. Tricuspid E velocity, E/A ratio and isovolumetric relaxation time (IVRT) in moderate and severe cases differed significantly from mild cases and control subjects. E,, A,, E,/A, ratio and IVRT of the lateral tricuspid annulus, and IVRT of the medial and lateral mitral annuli were different between mild cases and control subjects. E, velocity and IVRT of the lateral tricuspid annulus and IVRT of the medial and lateral mitral annuli were also different between mild cases and moderate to severe cases. Pulmonary function tests correlated well with E,, E,/A, and IVRT of lateral tricuspid annulus. Conclusion: Patients with BA have subclinical right ventricular diastolic dysfunction even in the early stages. The severity of the functional impairment is parallel with the severity of the disease. Tissue Doppler echocardiography has a greater predictive value than conventional imaging, and is useful for evaluating ventricular function in patients with BA. [source] Evaluation of Biventricular Functions With Tissue Doppler Imaging in Patients With Myotonic DystrophyCLINICAL CARDIOLOGY, Issue 3 2010Tolga Ozyigit MD Background: Myotonic dystrophy (MD) is characterized by myotonia with dystrophic involvement of the muscles. Cardiac involvement is usually not evident in the early stages of MD. Hypothesis: We investigated biventricular functions by tissue Doppler imaging (TDI) in MD patients with no overt cardiac involvement to explore the value of TDI in the early detection of myocardial dysfunction. Methods: A total of 21 MD patients (15 male, age: 32.2 ± 12.3 yrs) and 21 healthy controls (13 male, age: 32.2 ± 7.8 yrs) were included. In addition to conventional echocardiography, pulsed Doppler and TDI were performed including measurement of myocardial performance index (MPI); peak systolic (Sm) and early (Em) and atrial (Am) diastolic myocardial velocities at the basal mitral and tricuspid annulus. Results: All patients and controls had normal ejection fraction. Transmitral E peak velocity was significantly lower while both deceleration time of E velocity and isovolumic relaxation time were significantly longer in MD patients (P = 0.007, P = 0.001, and P < 0.001, respectively). Sm, Em and Am peak velocities were significantly lower in MD patients in all segments except for Em of the mitral anterior annulus and Am of the tricuspid lateral annulus. Both left and right ventricular MPI were significantly higher in MD patients (P < 0.001 and P = 0.013, respectively). Conclusion: There are changes in myocardial systolic and diastolic functions in MD patients although they have no overt heart failure. Myocardial tissue velocities and MPI are useful in identifying subclinical biventricular involvement in these patients. Copyright © 2010 Wiley Periodicals, Inc. [source] | ||||||||||