Contrast echocardiography to assess left ventricular volume and function in Beagle dogs: Comparison with 3-Tesla dual source parallel cardiac magnetic resonance imaging

Kim, J.H.; Lee, M.S.; Lee, S.Y.; Kim, S.Y.; Lee, S.J.; Park, Y.W.; Yeo, Ju-Hwan; Song, Seung Hoon; Park, N.W.; Hong, Sukho; Choi, Sang Il; Eom, Kidong

doi:10.1016/j.tvjl.2013.08.007

Cited by 11 publications

(24 citation statements)

References 34 publications

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“…Furthermore, in that study no significant differences in stroke volume measured at the aorta and main pulmonary artery were found when comparing the 4D flow CMR accelerated with k-t SENSE and the 2D PC CMR k-t SENSE sequence. The values of stroke volume in this study did show a low standard deviation in all sequences and the values measured in 2D PC CMR k-t SENSE and 4D flow CMR k-t SENSE were comparable with other studies measuring stroke volume by cardiac MRI in dogs of similar size (Hockings et al, 2003;Kim et al, 2013;Meyer et al, 2013;Sieslack et al, 2013;Sieslack et al, 2014;.…”

Section: Discussionsupporting

confidence: 88%

“…CMR in animals is used for evaluation of cardiac morphology (Contreras et al, 2008;Baumwart et al, 2009;, cardiac function (Hockings et al, 2003;MacDonald et al, 2005;Baumwart et al, 2009;Kim et al, 2013;Meyer et al, 2013;Sieslack et al, 2013;Sieslack et al, 2014; as well as associated diseases of the heart Mai et al, 2010), the pericardium (Boddy et al, 2011), and the adjacent vasculature (Mai et al, 2010;Lee et al, 2017). Comparison of stroke volume based on a flow-sensitive phase-contrast sequence in different anatomical locations provides important clinical information such as cardiac output, shunt fraction, collateral flow around obstructions and flow differ ences in the pulmonary arteries (Gatehouse et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

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Whole-heart 4D flow cardiac magnetic resonance in healthy dogs

Pfammatter

Campagna

Toaldo

et al. 2018

SAT

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In cardiac magnetic resonance imaging (CMR), accurate flow measurements rely on perpendicular plane-alignment with flow direction. For 2D phase contrast (PC) cardiac magnetic resonance measurements, planes have to be defined during the examination of the heart, which is time consuming and error-prone. Collection of flow information of the entire volume of the heart by a 4D flow CMR postpones plane alignment to post-processing. Sampling of such a large amount of data requires acceleration of data acquisition with techniques such as SENSitivity Encoding (k-t SENSE) or Broad-use Linear Acquisition Speed-up Technique (k-t BLAST). Objectives of the study were to compare 4D flow CMR, accelerated with two different acceleration methods with the established 2D PC CMR based on assessment of stroke volume at all four cardiac valves. The values of stroke volume acquired with the 4D flow CMR SENSE did not differ significantly when compared to the 2D PC CMR SENSE at the left side of the heart (aortic and mitral valve). Significant differences between the techniques were seen at the pulmonic and tricuspid valves. Acceleration with k-t BLAST revealed significantly lower values of stroke volume at all cardiac valves, except at the mitral valve. AbstractIn cardiac magnetic resonance imaging (CMR), accurate flow measurements rely on perpendicular plane-alignment with flow direction. For 2D phase contrast (PC) cardiac magnetic resonance measurements, planes have to be defined during the examination of the heart, which is time consuming and error-prone. Collection of flow information of the entire volume of the heart by a 4D flow CMR postpones plane alignment to post-processing. Sampling of such a large amount of data requires acceleration of data acquisition with techniques such as SENSitivity Encoding (k-t SENSE) or Broad-use Linear Acquisition Speed-up Technique (k-t BLAST). Objectives of the study were to compare 4D flow CMR, accelerated with two different acceleration methods with the established 2D PC CMR based on assessment of stroke volume at all four cardiac valves. The values of stroke volume acquired with the 4D flow CMR SENSE did not differ significantly when compared to the 2D PC CMR SENSE at the left side of the heart (aortic and mitral valve). Significant differences between the techniques were seen at the pulmonic and tricuspid valves. Acceleration with k-t BLAST revealed significantly lower values of stroke volume at all cardiac valves, except at the mitral valve.

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Section: Discussionsupporting

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Whole-heart 4D flow cardiac magnetic resonance in healthy dogs

Pfammatter

Campagna

Toaldo

et al. 2018

SAT

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“…We did perform an internal verification comparing the generated measurements to those acquired using standard morphological cardiac MRI using SSFP acquisitions for volumetric evaluation of the right (RVSV) and left (LVSV) ventricular stroke volume. 10,18,44,45 The results compared favorably using the Bland-Altman analysis but greater variability between the measurements using protocol B for pulmonary flow quantification. A greater variability of the values was seen using the volumetric estimation of the right ventricular stroke volume (RVSV) that likely caused this difference, however, the origin of this discrepancy is not fully clear and deems further investigation in a larger study population as this may possibly relate to the small study group used.…”

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

“…Morphological and functional imaging of the heart is primarily conducted using Cine balanced steady-state free precession (SSFP) sequences while flow imaging with MRI is done using flow-sensitive phase contrast (PC) sequences. These techniques are widely used in human cardiac MRI, 7,8 and cardiac MRI has found rapidly increasing interest in veterinary patients at in the recent years, [9][10][11][12][13][14][15][16] even though the potential role of MRI in veterinary cardiology has been critically discussed. 17 In contrast to human patients, veterinary patients need to be anesthetized, or at least heavily sedated to undergo these exams, potentially altering cardiovascular parameters.…”

Section: Introductionmentioning

confidence: 99%

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Effects of Two Different Anesthetic Protocols on Cardiac Flow Measured by Two Dimensional Phase Contrast Magnetic Resonance Imaging

Drees

Johnson

Stepien

et al. 2014

Vet Radiology Ultrasound

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Companion animals are anesthetized or heavily sedated to comply for cardiac MRI and different anesthetic protocols are expected to have variable effects on functional parameters measured. This study compared two anesthetic protocols (Protocol A: Midazolam, fentanyl; Protocol B: Dexmedetomidine) for their effect on quantitative and qualitative analysis of blood flow through the aortic, pulmonic, mitral and tricuspid valves using 2D phase contrast (PC) MRI in dogs. Mean flow per heartbeat through the pulmonary artery (Qp) and aorta (Qs) was compared to right (RVSV) and left (LVSV) ventricular stroke volumes determined using 2D Cine balanced steady-state free precession MRI as a reference standard. Pulmonary to systemic flow ratio (Qp/Qs) was also calculated. Differences in flow and Qp/Qs values generated using 2D PC MRI were not different between the two anesthetic protocols (P=1). Mean differences between Qp and right ventricular stroke volume (RVSV) were 3.82 (95% limits of agreement: 3.62, −11.26) ml/beat and 1.9 (−7.86, 11.66) ml/beat for anesthesia protocols A and B, respectively. Mean differences between Qs and left ventricular stroke volume (LVSV) were 1.65 (−5.04, 8.34) ml/beat and 0.03 (−4.65, 4.72) ml/beat for anesthesia protocols A and B, respectively. Mild tricuspid or mitral reflux was seen in 2/10 dogs using 2D PC MRI. No aortic or pulmonic insufficiency was observed. This study provides baseline data for evaluation of cardiac blood flow using 2D PC MRI in dogs. Where as no significant difference of cardiac blood flow was found for the anesthetic protocols used, verification in clinically affected patients is desirable.

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Cardiogenic Shock

Bolfer

Sleeper

2018

Textbook of Small Animal Emergency Medicine

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Contrast echocardiography to assess left ventricular volume and function in Beagle dogs: Comparison with 3-Tesla dual source parallel cardiac magnetic resonance imaging

Cited by 11 publications

References 34 publications

Whole-heart 4D flow cardiac magnetic resonance in healthy dogs

Whole-heart 4D flow cardiac magnetic resonance in healthy dogs

Effects of Two Different Anesthetic Protocols on Cardiac Flow Measured by Two Dimensional Phase Contrast Magnetic Resonance Imaging

Cardiogenic Shock

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