Sandor Kovacs

Nappo, R., Degiovanni, A., Bolzani, V., Sartori, C., Di Giovine, G., Cerini, P., Fossaceca, R., Kovács, S. J. & Marino, P. N., Jan 1 2016, In: Clinical Research in Cardiology. 105, 1, p. 17-28 12 p.

Research output: Contribution to journal › Article › peer-review

Open Access

24 Scopus citations

Vortex ring behavior provides the epigenetic blueprint for the human heart

Arvidsson, P. M., Kovács, S. J., Töger, J., Borgquist, R., Heiberg, E., Carlsson, M. & Arheden, H., Feb 26 2016, In: Scientific reports. 6, 22021.

Research output: Contribution to journal › Article › peer-review

Open Access

58 Scopus citations

Vortex-ring mixing as a measure of diastolic function of the human heart: Phantom validation and initial observations in healthy volunteers and patients with heart failure

Töger, J., Kanski, M., Arvidsson, P. M., Carlsson, M., Kovács, S. J., Borgquist, R., Revstedt, J., Söderlind, G., Arheden, H. & Heiberg, E., Jun 1 2016, In: Journal of Magnetic Resonance Imaging. 43, 6, p. 1386-1397 12 p.

Research output: Contribution to journal › Article › peer-review

15 Scopus citations

2015

Diastolic function in heart failure

Kovács, S. J., Jan 31 2015, In: Clinical Medicine Insights: Cardiology. 9, p. 49-55 7 p.

Research output: Contribution to journal › Article › peer-review

Open Access

12 Scopus citations

The impact of 6 weeks of atrial fibrillation on left atrial and ventricular structure and function

Kazui, T., Henn, M. C., Watanabe, Y., Kovács, S. J., Lawrance, C. P., Greenberg, J. W., Moon, M., Schuessler, R. B. & Damiano, R. J., Dec 2015, In: Journal of Thoracic and Cardiovascular Surgery. 150, 6, p. 1602-1608.e1

Research output: Contribution to journal › Article › peer-review

Open Access

22 Scopus citations

2014

Diastolic function alteration mechanisms in physiologic hypertrophy versus pathologic hypertrophy are elucidated by model-based Doppler E-wave analysis

Zhu, S., Morrell, T., Apor, A., Merkely, B., Vágó, H., Tóth, A., Ghosh, E. & Kovács, S. J., Dec 1 2014, In: Journal of Exercise Science and Fitness. 12, 2, p. 88-95 8 p.

Research output: Contribution to journal › Article › peer-review

Open Access

3 Scopus citations

Diastolic function in normal sinus rhythm vs. chronic atrial fibrillation: Comparison by fractionation of E-wave deceleration time into stiffness and relaxation components

Mossahebi, S. & Kovács, S. J., Jan 1 2014, In: Journal of Atrial Fibrillation. 6, 6, p. 13-19 7 p.

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

E-wave generated intraventricular diastolic vortex to L-wave relation: Model-based prediction with in vivo validation

Ghosh, E., Caruthers, S. D. & Kovács, S. J., Aug 1 2014, In: Journal of Applied Physiology. 117, 3, p. 316-324 9 p.

Research output: Contribution to journal › Article › peer-review

8 Scopus citations

Fractionating E-wave deceleration time into its stiffness and relaxation components distinguishes pseudonormal from normal filling

Mossahebi, S., Zhu, S. & Kovács, S. J., 2014, In: Circulation: Cardiovascular Imaging. 8, 1, e002177.

Research output: Contribution to journal › Article › peer-review

Open Access

7 Scopus citations

Kinematic Modeling Based Decomposition of Transmitral Flow (Doppler E-Wave) Deceleration Time into Stiffness and Relaxation Components

Mossahebi, S. & Kovács, S. J., Mar 2014, In: Cardiovascular Engineering and Technology. 5, 1, p. 25-34 10 p.

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

Quantification of global diastolic function by kinematic modeling-based analysis of transmitral flow via the parametrized diastolic filling formalism

Mossahebi, S., Zhu, S., Chen, H., Shmuylovich, L., Ghosh, E. & Kovács, S. J., Sep 1 2014, In: Journal of Visualized Experiments. 91, e51471.

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

The isovolumic relaxation to early rapid filling relation: Kinematic model based prediction with in vivo validation

Mossahebi, S. & Kovács, S. J., Mar 2014, In: Physiological Reports. 2, 3, e00258.

Research output: Contribution to journal › Article › peer-review

Open Access

2 Scopus citations

2013

Diastolic function in Olympic athletes versus controls: Stiffness-based and relaxation-based echocardiographic comparisons

Apor, A., Merkely, B., Morrell, T., Zhu, S., Ghosh, E., Vágó, H., Andrássy, P. & Kovács, S. J., Jun 2013, In: Journal of Exercise Science and Fitness. 11, 1, p. 29-34 6 p.

Research output: Contribution to journal › Article › peer-review

Open Access

4 Scopus citations

Early left ventricular diastolic function quantitation using directional impedances

Ghosh, E. & Kovács, S. J., Jun 2013, In: Annals of biomedical engineering. 41, 6, p. 1269-1278 10 p.

Research output: Contribution to journal › Article › peer-review

4 Scopus citations

Low-Sodium DASH diet improves diastolic function and ventricular arterial coupling in hypertensive heart failure with preserved ejection fraction

Hummel, S. L., Seymour, E. M., Brook, R. D., Sheth, S. S., Ghosh, E., Zhu, S., Weder, A. B., Kovacs, S. J. & Kolias, T. J., Nov 2013, In: Circulation: Heart Failure. 6, 6, p. 1165-1171 7 p.

Research output: Contribution to journal › Article › peer-review

Open Access

120 Scopus citations

The challenge of chamber stiffness determination in chronic atrial fibrillation VS. Normal sinus rhythm: Echocardiographic prediction with simultaneous hemodynamic validation

Mossahebi, S., Shmuylovich, L. & Kovács, S. J., Oct 1 2013, In: Journal of Atrial Fibrillation. 6, 3, p. 45-50 6 p.

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

The vortex formation time to diastolic function relation: Assessment of pseudonormalized versus normal filling

Ghosh, E. & Kovács, S. J., Nov 2013, In: Physiological Reports. 1, 6, p. 1-12 12 p., e00170.

Research output: Contribution to journal › Article › peer-review

Open Access

10 Scopus citations

2012

Kinematic modeling-based left ventricular diastatic (passive) chamber stiffness determination with in-vivo validation

Mossahebi, S. & Kovács, S. J., May 2012, In: Annals of biomedical engineering. 40, 5, p. 987-995 9 p.

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

Spatio-temporal attributes of left ventricular pressure decay rate during isovolumic relaxation

Ghosh, E. & Kovács, S. J., Mar 2012, In: American Journal of Physiology - Heart and Circulatory Physiology. 302, 5, p. H1094-H1101

Research output: Contribution to journal › Article › peer-review

4 Scopus citations

Vortex ring formation in the left ventricle of the heart: analysis by 4D flow MRI and Lagrangian coherent structures.

Töger, J., Kanski, M., Carlsson, M., Kovács, S. J., Söderlind, G., Arheden, H. & Heiberg, E., Dec 2012, In: Annals of biomedical engineering. 40, 12, p. 2652-2662 11 p.

Research output: Contribution to journal › Article › peer-review

104 Scopus citations

2011

The Diastolic Function to Cyclic Variation of Myocardial Ultrasonic Backscatter Relation: The Influence of Parametrized Diastolic Filling (PDF) Formalism Determined Chamber Properties

Lloyd, C. W., Shmuylovich, L., Holland, M. R., Miller, J. G. & Kovács, S. J., Aug 2011, In: Ultrasound in Medicine and Biology. 37, 8, p. 1185-1195 11 p.

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

The thermodynamics of diastole: Kinematic modeling-based derivation of the P-V loop to transmitral flow energy relation with in vivo validation

Mossahebi, S., Shmuylovich, L. & Kovács, S. J., Feb 1 2011, In: American Journal of Physiology - Heart and Circulatory Physiology. 300, 2, p. H514-H521

Research output: Contribution to journal › Article › peer-review

14 Scopus citations

2010

Point: Counterpoint: Left ventricular volume during diastasis is/is not the physiological in vivo equilibrium volume and is/is not related to diastolic suction

Shmuylovich, L., Chung, C. S. & Kovács, S. J., Aug 2010, In: Journal of Applied Physiology. 109, 2, p. 606-608 3 p.

Research output: Contribution to journal › Article › peer-review

20 Scopus citations

The E-Wave Delayed Relaxation Pattern to LV Pressure Contour Relation: Model-Based Prediction With in vivo Validation

Zhang, W., Shmuylovich, L. & Kovács, S. J., Mar 2010, In: Ultrasound in Medicine and Biology. 36, 3, p. 497-511 15 p.

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

Vortex formation time-to-left ventricular early rapid filling relation: Model-based prediction with echocardiographic validation

Ghosh, E., Shmuylovich, L. & Kovács, S. J., Dec 2010, In: Journal of Applied Physiology. 109, 6, p. 1812-1819 8 p.

Research output: Contribution to journal › Article › peer-review

22 Scopus citations

2009

The Age Dependence of Left Ventricular Filling Efficiency

Zhang, W. & Kovács, S. J., Jul 2009, In: Ultrasound in Medicine and Biology. 35, 7, p. 1076-1085 10 p.

Research output: Contribution to journal › Article › peer-review

10 Scopus citations

2008

Elucidation of spatially distinct compensatory mechanisms in diastole: Radial compensation for impaired longitudinal filling in left ventricular hypertrophy

Riordan, M. M. & Kovács, S. J., Feb 2008, In: Journal of Applied Physiology. 104, 2, p. 513-520 8 p.

Research output: Contribution to journal › Article › peer-review

10 Scopus citations

Imaging the motion of the heart with echocardiography: Advanced technology provides deeper insights into physiology and diastolic function

Kovács, S. J., Shmuylovich, L. & Zhang, W., Dec 1 2008, In: MedicaMundi. 52, 2, p. 31-36+71+79+81+83

Research output: Contribution to journal › Article › peer-review

Physical determinants of left ventricular isovolumic pressure decline: Model prediction with in vivo validation

Chung, C. S. & Kovács, S. J., Apr 2008, In: American Journal of Physiology - Heart and Circulatory Physiology. 294, 4, p. H1589-H1596

Research output: Contribution to journal › Article › peer-review

31 Scopus citations

Stiffness and relaxation components of the exponential and logistic time constants may be used to derive a load-independent index of isovolumic pressure decay

Shmuylovich, L. & Kovács, S. J., Dec 2008, In: American Journal of Physiology - Heart and Circulatory Physiology. 295, 6, p. H2551-H2559

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

The diastatic pressure-volume relationship is not the same as the end-diastolic pressure-volume relationship

Zhang, W. & Kovács, S. J., Jun 2008, In: American Journal of Physiology - Heart and Circulatory Physiology. 294, 6, p. H2750-H2760

Research output: Contribution to journal › Article › peer-review

26 Scopus citations

The effects of caloric restriction- and exercise-induced weight loss on left ventricular diastolic function

Riordan, M. M., Weiss, E. P., Meyer, T. E., Ehsani, A. A., Racette, S. B., Villareal, D. T., Fontana, L., Holloszy, J. O. & Kovács, S. J., Mar 2008, In: American Journal of Physiology - Heart and Circulatory Physiology. 294, 3, p. H1174-H1182

Research output: Contribution to journal › Article › peer-review

50 Scopus citations

Transmitral Flow Velocity-Contour Variation After Premature Ventricular Contractions: A Novel Test of the Load-Independent Index of Diastolic Filling

Boskovski, M. T., Shmuylovich, L. & Kovács, S. J., Dec 2008, In: Ultrasound in Medicine and Biology. 34, 12, p. 1901-1908 8 p.

Research output: Contribution to journal › Article › peer-review

7 Scopus citations

2007

Absence of diastolic mitral annular oscillations is a marker for relaxation-related diastolic dysfunction

Riordan, M. M. & Kovács, S. J., Jun 2007, In: American Journal of Physiology - Heart and Circulatory Physiology. 292, 6, p. H2952-H2958

Research output: Contribution to journal › Article › peer-review

14 Scopus citations

Contraction-relaxation coupling mechanism characterization in the thermodynamic phase plane: Normal vs. impaired left ventricular ejection fraction

Wu, Y., Yu, Y. & Kovács, S. J., Apr 2007, In: Journal of Applied Physiology. 102, 4, p. 1367-1373 7 p.

Research output: Contribution to journal › Article › peer-review

4 Scopus citations

E-wave deceleration time may not provide an accurate determination of LV chamber stiffness if LV relaxation/viscoelasticity is unknown

Shmuylovich, L. & Kovács, S. J., Jun 2007, In: American Journal of Physiology - Heart and Circulatory Physiology. 292, 6, p. H2712-H2720

Research output: Contribution to journal › Article › peer-review

31 Scopus citations

Pressure phase-plane based determination of the onset of left ventricular relaxation

Chung, C. S. & Kovács, S. J., Dec 2007, In: Cardiovascular Engineering. 7, 4, p. 162-171 10 p.

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

Stiffness- and relaxation-based quantitation of radial left ventricular oscillations: Elucidation of regional diastolic function mechanisms

Riordan, M. M. & Kovács, S. J., May 2007, In: Journal of Applied Physiology. 102, 5, p. 1862-1870 9 p.

Research output: Contribution to journal › Article › peer-review

7 Scopus citations

The Kinematic Filling Efficiency Index of the Left Ventricle: Contrasting Normal vs. Diabetic Physiology

Zhang, W., Chung, C. S., Riordan, M. M., Wu, Y., Shmuylovich, L. & Kovács, S. J., Jun 2007, In: Ultrasound in Medicine and Biology. 33, 6, p. 842-850 9 p.

Research output: Contribution to journal › Article › peer-review

10 Scopus citations

2006

Consequences of increasing heart rate on deceleration time, the velocity-time integral, and E/A

Chung, C. S. & Kovács, S. J., Jan 1 2006, In: American Journal of Cardiology. 97, 1, p. 130-136 7 p.

Research output: Contribution to journal › Article › peer-review

33 Scopus citations

Derivation and left ventricular pressure phase plane based validation of a time dependent isometric crossbridge attachment model

Zhang, W., Chung, C. S. & Kovács, S. J., Dec 2006, In: Cardiovascular Engineering. 6, 4, p. 132-144 13 p.

Research output: Contribution to journal › Article › peer-review

4 Scopus citations

Diastolic ventricular-vascular stiffness and relaxation relation: Elucidation of coupling via pressure phase plane-derived indexes

Chung, C. S., Strunc, A., Oliver, R. & Kovács, S. J., 2006, In: American Journal of Physiology - Heart and Circulatory Physiology. 291, 5, p. H2415-H2423

Research output: Contribution to journal › Article › peer-review

19 Scopus citations

Frequency-based analysis of the early rapid filling pressure-flow relation elucidates diastolic efficiency mechanisms

Wu, Y. & Kovács, S. J., 2006, In: American Journal of Physiology - Heart and Circulatory Physiology. 291, 6, p. H2942-H2949

Research output: Contribution to journal › Article › peer-review

14 Scopus citations

Isovolumic pressure-to-early rapid filling decay rate relation: Model-based derivation and validation via simultaneous catheterization echocardiography

Chung, C. S., Ajo, D. M. & Kovács, S. J., Feb 2006, In: Journal of Applied Physiology. 100, 2, p. 528-534 7 p.

Research output: Contribution to journal › Article › peer-review

27 Scopus citations

Load-independent index of diastolic filling: Model-based derivation with in vivo validation in control and diastolic dysfunction subjects

Shmuylovich, L. & Kovács, S. J., 2006, In: Journal of Applied Physiology. 101, 1, p. 92-101 10 p.

Research output: Contribution to journal › Article › peer-review

39 Scopus citations

Sandor Kovacs

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