Search Results - "Tyberg, John V."

Systemic vascular effects of acute electrical baroreflex stimulation by Burgoyne, Steven, Georgakopoulos, Dimitrios, Belenkie, Israel, Tyberg, John V

“…We intended to determine if acute baroreflex activation therapy (BAT) increases venous capacitance and aortic conductance. BAT is effective in resistant…”
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Clinical feasibility and validation of 3D principal strain analysis from cine MRI: comparison to 2D strain by MRI and 3D speckle tracking echocardiography by Satriano, Alessandro, Heydari, Bobak, Narous, Mariam, Exner, Derek V., Mikami, Yoko, Attwood, Monica M., Tyberg, John V., Lydell, Carmen P., Howarth, Andrew G., Fine, Nowell M., White, James A.

“…Two-dimensional (2D) strain analysis is constrained by geometry-dependent reference directions of deformation (i.e. radial, circumferential, and longitudinal)…”
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Time-domain representation of ventricular-arterial coupling as a windkessel and wave system by Wang, Jiun-Jr, O'Brien, Aoife B, Shrive, Nigel G, Parker, Kim H, Tyberg, John V

“…The differences in shape between central aortic pressure (P(Ao)) and flow waveforms have never been explained satisfactorily in that the assumed explanation…”
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Hemodynamic Evaluation of Vasomotion: Capacitance vs. Conductance by Tyberg, John V., MD, PhD, Burrowes, Lindsay M., BEng (Mech), PhD (Candidate), Sheldon, Robert S., MD, PhD

“…Abstract In cardiovascular physiology, perhaps the most important parameters are pressure and flow. Typically, following the pattern of Ohm's Law, pressure and…”
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Does fitness level modulate the cardiovascular hemodynamic response to exercise? by Stickland, Michael K, Welsh, Robert C, Petersen, Stewart R, Tyberg, John V, Anderson, William D, Jones, Richard L, Taylor, Dylan A, Bouffard, Marcel, Haykowsky, Mark J

“…Faculties of 1 Physical Education and Recreation, 2 Medicine and Dentistry, and 3 Rehabilitation Medicine, University of Alberta, Edmonton, Alberta; 4…”
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A review of the current status of pericardial closure following cardiac surgery by Boyd, W Douglas, Tyberg, John V, Cox, James L

“…Some cardiac surgeons prefer to close the pericardium whenever possible following surgery, others specifically avoid this practice, and still others believe…”
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Wave Propagation and Reflection in the Canine Aorta: Analysis Using a Reservoir-Wave Approach by Wang, Jiun-Jr, PhD, Shrive, Nigel G., PhD, Parker, Kim H., PhD, Hughes, Alun D., PhD, Tyberg, John V., MD, PhD

“…Abstract Background Our objective was to demonstrate wave propagation and reflection in the canine aorta. Recently we proposed that aortic pressure is the…”
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Arterial flow patterns in healthy transitioning near-term neonates by Stritzke, Amelie, Murthy, Prashanth, Kaur, Sharandeep, Kuret, Verena, Liang, Zhiying, Howell, Sarah, Tyberg, John V

“…ObjectiveSignificant haemodynamic changes occur at delivery impacting organ blood flow distribution. We aimed to characterise Doppler indices patterns over…”
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Oxygenation-sensitive CMR for assessing vasodilator-induced changes of myocardial oxygenation by Vöhringer, Matthias, Flewitt, Jacqueline A, Green, Jordin D, Dharmakumar, Rohan, Wang, Jr, Jiun, Tyberg, John V, Friedrich, Matthias G

“…As myocardial oxygenation may serve as a marker for ischemia and microvascular dysfunction, it could be clinically useful to have a non-invasive measure of…”
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Alterations in Aortic Wave Reflection With Vasodilation and Vasoconstriction in Anaesthetized Dogs by Wang, Jiun-Jr, PhD, Bouwmeester, J. Christopher, MSc, Belenkie, Israel, MD, Shrive, Nigel G., PhD, Tyberg, John V., MD, PhD

“…Abstract Background Using the reservoir-wave approach, we studied wave propagation, reflection, and re-reflection in the canine aorta with administrations of…”
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Systemic venous circulation. Waves propagating on a windkessel: relation of arterial and venous windkessels to systemic vascular resistance by Wang, Jiun-Jr, Flewitt, Jacqueline A, Shrive, Nigel G, Parker, Kim H, Tyberg, John V

“…Compared with arterial hemodynamics, there has been relatively little study of venous hemodynamics. We propose that the venous system behaves just like the…”
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Measurements of changes in left ventricular volume, strain, and twist during isovolumic relaxation using MRI by Cheng-Baron, June, Chow, Kelvin, Khoo, Nee Scze, Esch, Ben T, Scott, Jessica M, Haykowsky, Mark J, Tyberg, John V, Thompson, Richard B

“…Left ventricular (LV) active relaxation begins before aortic valve closure and is largely completed during isovolumic relaxation (IVR), before mitral valve…”
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Edema as a Very Early Marker for Acute Myocardial Ischemia : A Cardiovascular Magnetic Resonance Study by ABDEL-ATY, Hassan, COCKER, Myra, MEEK, Cheryl, TYBERG, John V, FRIEDRICH, Matthias G

“…This study was designed to determine whether imaging myocardial edema would identify acute myocardial ischemia before irreversible injury takes place. Early…”
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Wave propagation and reflection in the aorta and implications of the aortic Windkessel by Tyberg, John V.

“…Some have said that it is inappropriate and perhaps impossible to consider wave and Windkessel phenomena simultaneously. For 50 years, arterial hemodynamics…”
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Assessment of left ventricular diastolic suction in dogs using wave-intensity analysis by Wang, Zhibin, Jalali, Fereshteh, Sun, Yi-Hui, Wang, Jiun-Jr, Parker, Kim H, Tyberg, John V

“…Two apparently different types of mechanisms have emerged to explain diastolic suction (DS), that property of the left ventricle (LV) that tends to cause it to…”
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Compression Garment Reduces Orthostatic Tachycardia and Symptoms in Patients With Postural Orthostatic Tachycardia Syndrome by Bourne, Kate M., Sheldon, Robert S., Hall, Juliette, Lloyd, Matthew, Kogut, Karolina, Sheikh, Nasia, Jorge, Juliana, Ng, Jessica, Exner, Derek V., Tyberg, John V., Raj, Satish R.

“…Postural orthostatic tachycardia syndrome (POTS) is a chronic form of orthostatic intolerance associated with a significant symptom burden. Compression…”
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Alternative Approaches to the Assessment of the Systemic Circulation and Left Ventricular Performance: A Proof-of-Concept Study by Howell, Sarah, Burrowes, Lindsay M, Belenkie, Israel, Ter Keurs, Henk E D J, Lei, Lucy, Raj, Satish R, Bouwmeester, J Christopher, Sheldon, Robert S, Shrive, Nigel G, Tyberg, John V

“…The purpose of this article is to examine the systemic circulation and left ventricular (LV) performance by alternative, nonconventional approaches: systemic…”
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RV filling modulates LV function by direct ventricular interaction during mechanical ventilation by Mitchell, Jamie R, Whitelaw, William A, Sas, Rozsa, Smith, Eldon R, Tyberg, John V, Belenkie, Israel

“…During mechanical ventilation, phasic changes in systemic venous return modulate right ventricular output but may also affect left ventricular function by…”
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Derek G. Gibson—a unique scientist and cardiologist, 1936–2021 by Henein, Michael Y, Tyberg, John V, Smiseth, Otto A

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Frank's law of the heart: Found in translation by de Tombe, Pieter P., Tyberg, John V.

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