Search Results - "Larson, Erik R"

Scaling the Low-Shear Pulsatile TORVAD for Pediatric Heart Failure by Gohean, Jeffrey R, Larson, Erik R, Hsi, Brian H, Kurusz, Mark, Smalling, Richard W, Longoria, Raul G

“…This article provides an overview of the design challenges associated with scaling the low-shear pulsatile TORVAD ventricular assist device (VAD) for treating…”
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Admittance to detect alterations in left ventricular stroke volume by Larson, Erik R., PhD, Porterfield, John E., PhD, Sagar, Sandeep, MD, PhD, Marmol-Velez, Juan, MD, Panday, Manoj, MD, Escobedo, Daniel, Michalek, Joel, PhD, Ouyang, Yongjian, MS, Valvano, Jonathan W., PhD, Pearce, John A., PhD, Feldman, Marc D., MD

“…Background Implantable cardioverter-defibrillators monitor intracardiac electrograms (EGMs) to discriminate between ventricular and supraventricular…”
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Dynamic correction for parallel conductance, Gp, and gain factor, α, in invasive murine left ventricular volume measurements by PORTERFIELD, John E, KOTTAM, Anil T. G, RAGHAVAN, Karthik, ESCOBEDO, Daniel, JENKINS, James T, LARSON, Erik R, TREVINO, Rodolfo J, VALVANO, Jonathan W, PEARCE, John A, FELDMAN, Marc D

“…The conductance catheter technique could be improved by determining instantaneous parallel conductance (G(P)), which is known to be time varying, and by…”
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Preload Sensitivity with TORVAD Counterpulse Support Prevents Suction and Overpumping by Gohean, Jeffrey R., Larson, Erik R., Longoria, Raul G., Kurusz, Mark, Smalling, Richard W.

“…Purpose This study compares preload sensitivity of continuous flow (CF) VAD support to counterpulsation using the Windmill toroidal VAD (TORVAD). The TORVAD is…”
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Analysis of the Spatial Sensitivity of Conductance/Admittance Catheter Ventricular Volume Estimation by Larson, Erik R., Feldman, Marc D., Valvano, Jonathan W., Pearce, John A.

“…Conductance catheters are known to have a nonuniform spatial sensitivity due to the distribution of the electric field. The Geselowitz relation is applied to…”
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Preservation of Native Aortic Valve Flow and Full Hemodynamic Support with the TORVAD Using a Computational Model of the Cardiovascular System by Gohean, Jeffrey R, George, Mitchell J, Chang, Kay-Won, Larson, Erik R, Pate, Thomas D, Kurusz, Mark, Longoria, Raul G, Smalling, Richard W

“…This article describes the stroke volume selection and operational design for the toroidal ventricular assist device (TORVAD), a synchronous,…”
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Left ventricular epicardial admittance measurement for detection of acute LV dilation by PORTERFIELD, John E, LARSON, Erik R, JENKINS, James T, ESCOBEDO, Daniel, VALVANO, Jonathan W, PEARCE, John A, FELDMAN, Marc D

“…There are two implanted heart failure warning systems incorporated into biventricular pacemakers/automatic implantable cardiac defibrillators and tested in…”
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Admittance Measurement for the Detection of Acute Decompensated HF (ADHF) by Porterfield, John E, Larson, Erik R, Escobedo, Daniel, Valvano, Jonathan W, Pearce, John A, Feldman, Marc D

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A bio-telemetric device for measurement of left ventricular pressure-volume loops using the admittance technique in conscious, ambulatory rats by Raghavan, Karthik, Feldman, Marc D, Porterfield, John E, Larson, Erik R, Jenkins, J Travis, Escobedo, Daniel, Pearce, John A, Valvano, Jonathan W

“…This paper presents the design, construction and testing of a device to measure pressure-volume loops in the left ventricle of conscious, ambulatory rats…”
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Application of the Geselowitz relationship to the murine conductance catheter by Larson, E. R., Pearce, J. A.

“…Conductance catheters are known to have a nonuniform spatial sensitivity due to the distribution of the electric field. The Geselowitz relation is applied to…”
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Accuracy considerations in catheter based estimation of left ventricular volume by Pearce, J A, Porterfield, J E, Larson, E R, Valvano, J W, Feldman, M D

“…Cardiac volume estimation in the Left Ventricle from impedance or admittance measurement is subject to two major sources of error: parallel current pathways in…”
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Dynamic correction for parallel conductance, G^sub P^, and gain factor, [alpha], in invasive murine left ventricular volume measurements by Porterfield, John E, Kottam, Anil T G, Raghavan, Karthik, Escobedo, Daniel, Jenkins, James T, Larson, Erik R, Treviño, Rodolfo J, Valvano, Jonathan W, Pearce, John A, Feldman, Marc D

“…The conductance catheter technique could be improved by determining instantaneous parallel conductance (G...), which is known to be time varying, and by…”
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Dynamic correction for parallel conductance, GP, and gain factor, {alpha}, in invasive murine left ventricular volume measurements by Porterfield, John E, Kottam, Anil T. G, Raghavan, Karthik, Escobedo, Daniel, Jenkins, James T, Larson, Erik R, Trevino, Rodolfo J, Valvano, Jonathan W, Pearce, John A, Feldman, Marc D

“…1 Departments of Electrical and Computer Engineering, and ; 2 Biomedical Engineering, The University of Texas, Austin; ; 3 Division of Cardiology, The…”
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Dynamic correction for parallel conductance, G P , and gain factor, α, in invasive murine left ventricular volume measurements by Porterfield, John E., Kottam, Anil T. G., Raghavan, Karthik, Escobedo, Daniel, Jenkins, James T., Larson, Erik R., Treviño, Rodolfo J., Valvano, Jonathan W., Pearce, John A., Feldman, Marc D.

“…The conductance catheter technique could be improved by determining instantaneous parallel conductance (G P ), which is known to be time varying, and by…”
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Embedded Medical Devices: Pressure Volume Loops in Rodents by Loeffler, K., Porterfield, J. E., Larson, E. R., Escobedo, D., Escobar, G. P., Feldman, M. D., Valvano, J. W.

“…Man has been instrumenting the human body with electrical devices since the early 1800s. McWilliam built an electrical stimulator of the heart in 1889. In the…”
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