Sandor Kovacs

Research Output

Research Output per year

1977 2020

• 2951 Citations
• 95 Article
• 14 Conference contribution
• 12 Conference article
• 9 Letter
• 11 More
  • 4 Review article
  • 3 Editorial
  • 2 Chapter
  • 2 Comment/debate

Research Output per year

Research Output per year

Search results

• 2020

  Alternative diastolic function models of ventricular longitudinal filling velocity are mathematically identical

  Bhagavan, D., Padovano, W. M. & Kovács, S. J., May 1 2020, In : American Journal of Physiology - Heart and Circulatory Physiology. 318, 5, p. H1059-H1067

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

  • Ventricular Function
  • Heart Ventricles
  • Diastole
  • Suction
  • Biomechanical Phenomena
• 2018

  Quantifying Diastolic Function: From E-Waves as Triangles to Physiologic Contours via the ‘Geometric Method’

  Golman, M., Padovano, W., Shmuylovich, L. & Kovács, S. J., Mar 1 2018, In : Cardiovascular Engineering and Technology. 9, 1, p. 105-119 15 p.

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

  • Deceleration
  • Acceleration
  • Physiology
  • Gold
  • Flow velocity
  2 Scopus citations
• 2017

  Hydraulic forces contribute to left ventricular diastolic filling

  Maksuti, E., Carlsson, M., Arheden, H., Kovács, S. J., Broomé, M. & Ugander, M., Mar 3 2017, In : Scientific reports. 7, 43505.

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

  Open Access

  • Diastole
  • Anatomic Models
  • Left Ventricular Function
  • Volunteers
  • Anatomy
  2 Scopus citations

• The quest for load-independent left ventricular chamber properties: exploring the normalized pressure–volume loop

  Kohli, K. & Kovács, S. J., Mar 1 2017, In : Physiological Reports. 5, 6, e13160.

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

  Open Access

  • Sarcomeres
  • Ventricular Pressure
  • Datasets
  • Pressure
  • Animals
  1 Scopus citations
• 2016

  Quantitative assessment of atrial conduit function: a new index of diastolic dysfunction

  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

  • Atrial Function
  • Stroke Volume
  • Three-Dimensional Echocardiography
  • Heart Failure
  • Left Atrial Function
  15 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

  • Epigenomics
  • Heart Failure
  • Heart
  • Cardiac Volume
  • Hydrodynamics
  38 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

  • Heart Failure
  • Healthy Volunteers
  • Heart
  • Heart Ventricles
  • Fluorescence
  11 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

  • Heart Failure
  • Suction
  • Heart
  • Causality
  • Diastolic Heart Failure
  11 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

  • Ventricular Function
  • Atrial Fibrillation
  • Stroke Volume
  • Left Ventricular Function
  • Swine
  17 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

  • Hypertrophy
  • Deceleration
  • Hypertrophic Cardiomyopathy
  • Acceleration
  • Aortic Valve Stenosis
  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

  • Deceleration
  • Atrial Fibrillation
  • Long Term Adverse Effects
  • Suction
  • Cardiac Catheterization
  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

  • Heart Ventricles
  • Magnetic Resonance Imaging
  • Doppler Echocardiography
  • Suction
  • Mechanics
  7 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

  • Deceleration
  • Catheterization
  • Stroke Volume
  • Research Design
  • Sensitivity and Specificity
  6 Scopus citations

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

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

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

  • Deceleration
  • Biomechanical Phenomena
  • Kinematics
  • Decomposition
  • Stiffness
  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

  • Biomechanical Phenomena
  • Kinematics
  • Echocardiography
  • Suction
  • Cardiology
  6 Scopus citations

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

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

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

  Open Access

  • Diastole
  • Mitral Valve
  • Biomechanical Phenomena
  • Deceleration
  • Doppler Echocardiography
  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

  • Athletes
  • Biomechanical Phenomena
  • Water Sports
  • Magnetic Resonance Imaging
  • Heart
  3 Scopus citations

• Early left ventricular diastolic function quantitation using directional impedances

  Ghosh, E. & Kovács, S. J., Jun 1 2013, In : Annals of biomedical engineering. 41, 6, p. 1269-1278 10 p.

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

  • Acoustic impedance
  • Pressure gradient
  • Blood
  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

  • Dietary Approaches To Stop Hypertension
  • Sodium-Restricted Diet
  • Ventricular Function
  • Heart Failure
  • Blood Pressure
  96 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

  • Atrial Fibrillation
  • Hemodynamics
  • 5-((4,6-dichloro-1,3,5-triazin-2-yl)amino)fluorescein
  • Echocardiography
  • Cardiac Catheterization
  2 Scopus citations

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

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

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

  Open Access

  • Heart
  • Biophysics
  • Diastole
  • Suction
  • Mitral Valve
  9 Scopus citations
• 2012

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

  Mossahebi, S. & Kovács, S. J., May 1 2012, In : Annals of biomedical engineering. 40, 5, p. 987-995 9 p.

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

  • Kinematics
  • Stiffness
  • Echocardiography
  • Catheters
  • Flow velocity
  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

  • Ventricular Pressure
  • Biomechanical Phenomena
  • Pressure
  • Transducers
  • Muscle Cells
  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

  • Magnetic resonance imaging
  • Vortex flow
  • Flow velocity
  • Magnetic resonance
  • Muscle
  79 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

  • Ultrasonics
  • Biomechanical Phenomena
  • chambers
  • ultrasonics
  • formalism
  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

  • Thermodynamics
  • Diastole
  • Biomechanical Phenomena
  • Pressure
  • Suction
  13 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
  17 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 1 2010, In : Ultrasound in Medicine and Biology. 36, 3, p. 497-511 15 p.

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

  • Ventricular Pressure
  • pressure recovery
  • Pressure
  • predictions
  • sinuses
  12 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 1 2010, In : Journal of Applied Physiology. 109, 6, p. 1812-1819 8 p.

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

  • Biomechanical Phenomena
  • Heart Ventricles
  • Mechanics
  • Hemodynamics
  • Pressure
  20 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

  • Biomechanical Phenomena
  • kinematics
  • Diastole
  • diastole
  • Echocardiography
  9 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

  • Diastole
  • Left Ventricular Hypertrophy
  • Stroke Volume
  • Cardiac Output
  • Ischemia
  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

  • Cardiologists
  • Echocardiography
  • Cardiovascular Physiological Phenomena
  • Technology
  • Heart

• 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

  • Ventricular Pressure
  • Pressure
  • Physiological Phenomena
  29 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

  • Pressure
  • Biomechanical Phenomena
  • Catheterization
  • Logistic Models
  12 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

  • Pressure
  • Blood Pressure
  • Heart
  • Diastole
  • Systole
  23 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

  • Caloric Restriction
  • Left Ventricular Function
  • Weight Loss
  • Exercise
  • Body Mass Index
  45 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 1 2008, In : Ultrasound in Medicine and Biology. 34, 12, p. 1901-1908 8 p.

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

  • Ventricular Premature Complexes
  • contraction
  • flow velocity
  • Echocardiography
  • synchronism
  6 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

  • Biomechanical Phenomena
  • Cardiac Catheterization
  • Hemodynamics
  • Heart Rate
  13 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

  • Thermodynamics
  • Stroke Volume
  • Kinetics
  • Cardiac Catheterization
  • Pressure
  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

  • Deceleration
  • Biomechanical Phenomena
  • Catheterization
  • Echocardiography
  • Heart
  29 Scopus citations

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

  Chung, C. S. & Kovács, S. J., Dec 1 2007, In : Cardiovascular Engineering. 7, 4, p. 162-171 10 p.

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

  • Thermodynamics
  • Nonlinear Dynamics
  • Pressure
  • Thorax
  • Heart
  4 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

  • Cardiac Volume
  • Diastole
  • Left Ventricular Function
  • Biomechanical Phenomena
  • Echocardiography
  6 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

  • physiology
  • Biomechanical Phenomena
  • Heart Ventricles
  • kinematics
  • Ventricular Function
  9 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

  • Deceleration
  • Heart Rate
  • Diastolic Heart Failure
  • Doppler Echocardiography
  • Acceleration
  26 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 1 2006, In : Cardiovascular Engineering. 6, 4, p. 132-144 13 p.

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

  • Ventricular Pressure
  • Pressure
  • Calcium
  • Ventricular Premature Complexes
  • Accidental Falls
  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

  • Vascular Stiffness
  • Pressure
  • Blood Vessels
  • Diastole
  • Systole
  18 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

  • Deceleration
  • Pressure
  • Electric Impedance
  • Thermodynamics
  • Viscosity
  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

  • Catheterization
  • Echocardiography
  • Pressure
  • Viscosity
  • Deceleration
  26 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

  • Head
  • Pressure
  • Doppler Echocardiography
  • Biomechanical Phenomena
  • Linear Models
  37 Scopus citations

• Long-term caloric restriction ameliorates the decline in diastolic function in humans

  Meyer, T. E., Kovács, S. J., Ehsani, A. A., Klein, S., Holloszy, J. O. & Fontana, L., Jan 17 2006, In : Journal of the American College of Cardiology. 47, 2, p. 398-402 5 p.

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

  Open Access

  • Caloric Restriction
  • Western Diet
  • Transforming Growth Factor beta1
  • C-Reactive Protein
  • Tumor Necrosis Factor-alpha
  273 Scopus citations