Impact of the ECG Gating Method on Ventricular Volumes and Ejection Fractions Assessed By Cardiovascular Magnetic Resonance Imaging

Sievers, Burkhard; Addo, Marvin; Kirchberg, Simon; Bakan, Asli; John-Puthenveettil, Binu; Franken, Ulrich; Trappe, Hans‐Joachim

doi:10.1081/jcmr-200053515

Cited by 23 publications

(11 citation statements)

References 12 publications

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“…The lower values of EDV and ejection fraction of the LV acquired with the 3D cine imaging using k-t BLAST might be attributed to the prospective gating because it could not capture end-diastolic phase accurately when the volume of LV cavity is largest [13,18,19]. The k-t BLAST reconstruction error due to denser signal packing in x-f space and high acceleration factor might affect the assessment of cardiac functional parameters [9].…”

Section: Discussionmentioning

confidence: 93%

Evaluation of global cardiac functional parameters using single-breath-hold three-dimensional cine steady-state free precession MR imaging with two types of speed-up techniques: Comparison with two-dimensional cine imaging

Amano

Suzuki²,

Cauteren³

2008

Computerized Medical Imaging and Graphics

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Section: Discussionmentioning

confidence: 93%

Evaluation of global cardiac functional parameters using single-breath-hold three-dimensional cine steady-state free precession MR imaging with two types of speed-up techniques: Comparison with two-dimensional cine imaging

Amano

Suzuki²,

Cauteren³

2008

Computerized Medical Imaging and Graphics

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“…Therefore, only 80%-90% of the entire cardiac cycle was covered and was available for data analysis. Due to the fact that no data were recorded for the remaining 10%-20% of the cardiac cycle, the diastolic phase is underestimated [46]. In the current study, we were only able to measure flow through the JVs since the structure and function of the overall cerebral venous system are difficult to assess with the current imaging techniques and as a result, there are only limited data published [47].…”

Section: Limitationsmentioning

confidence: 95%

Continuous positive airway pressure alters cranial blood flow and cerebrospinal fluid dynamics at the craniovertebral junction

Yiallourou

Daners

Kurtcuoglu

et al. 2015

Interdisciplinary Neurosurgery

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Keywords:Cerebral blood flow Cerebrospinal fluid dynamics Spinal subarachnoid space Cerebral autoregulation Cervical spine Continuous positive airway pressure Sleep apnea Intrathoracic pressure Craniospinal compliance PtcCO 2 2D phase-contrast MRI Purpose: To investigate the impact of continuous positive airway pressure (CPAP) applied by a full-face fitted mask at 15 cmH 2 O on total cerebral blood flow (tCBF), jugular venous flow (tJVF) and cerebrospinal fluid (CSF) flow. Materials and methods: Axial 2D phase-contrast MRI measurements were acquired at the C2-C3 vertebral level for 23 healthy male awake subjects at baseline (without) and with CPAP applied. CSF flow was quantified within the spinal subarachnoid space and tCBF was quantified based on the summation of blood flow within the left and right internal carotid and vertebral arteries. tJVF was quantified based on the summation of blood flow within the left and right jugular veins. Heart rate, transcutaneous carbon dioxide (PtcCO 2 ) and oxygen saturation were continuously monitored during the MR protocol. Results: CPAP decreased the pulse amplitude (PtPPA) of tJVF by 21% (p = 0.004). CSF stroke volume (SV) and PtPPA also decreased by 20% (p = 0.003) and 15% (p = 0.005), respectively. Change in tCBF SV and PtPPA was not significant. However, the timing of maximum systolic tCBF occurred significantly earlier under CPAP. CSF flow and tJVF waveforms showed significant spatial and temporal differences in waveform feature points, and spectral analysis revealed a decrease in the first harmonic of tJVF under CPAP (p = 0.001). Under CPAP, a 5% decrease in PtcCO 2 (p = 0.003) and 9% increase in HR (p = 0.006) were measured. However, these HR and PtcCO 2 changes were not correlated with any changes in arterial, venous or CSF flow dynamics. Conclusion: Application of CPAP via a full-fitted mask at 15 cm H 2 O was found to have a significant effect on intracranial venous outflow and spinal CSF flow at the C2 vertebral level in healthy adult-age awake volunteers. CPAP can be used to non-invasively provoke changes in intracranial and CSF flow dynamics.

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“…The advantage of this technique is that only the required data are collected. The disadvantage, however, is that, to allow for natural variability in the R-R interval, the final 10%-20% of the R-R window (72) is not included in the acquisition window (while the system is waiting for the next R wave). A further issue is that this "dead time" disturbs the steady state and leads to increased signal intensity in the first few frames when a conventional gradientecho cine sequence is used (73), referred to as the "lightening artifact," and to other artifacts when a balanced steady-state free precession sequence is Darker squares indicate that this result measurement was more common.…”

Section: Dealing With the Motionmentioning

confidence: 99%

“…Retrospective gating can be achieved in two ways (72). A segment of k-space may be repeatedly acquired through the R-R interval and moved to the next segment on the fly when the next R wave is detected.…”

Section: Whole-heart Rigid Transformation Parameters and Selected Poimentioning

confidence: 99%

Motion in Cardiovascular MR Imaging

Scott¹,

Keegan²,

Firmin³

2009

Radiology

140

137

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Modern rapid magnetic resonance (MR) imaging techniques have led to widespread use of the modality in cardiac imaging. Despite this progress, many MR studies suffer from image degradation due to involuntary motion during the acquisition. This review describes the type and extent of the motion of the heart due to the cardiac and respiratory cycles, which create image artifacts. Methods of eliminating or reducing the problems caused by the cardiac cycle are discussed, including electrocardiogram gating, subject-specific acquisition windows, and section tracking. Similarly, for respiratory motion of the heart, techniques such as breath holding, respiratory gating, section tracking, phase-encoding ordering, subject-specific translational models, and a range of new techniques are considered.

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Impact of the ECG Gating Method on Ventricular Volumes and Ejection Fractions Assessed By Cardiovascular Magnetic Resonance Imaging

Abstract: The gating method has a significant impact on volume and EF measurements. The global ventricular EF is underestimated by using the prospective triggering technique. However, the difference in the left ventricle is small and might not be of clinical relevance.

Cited by 23 publications

References 12 publications

Evaluation of global cardiac functional parameters using single-breath-hold three-dimensional cine steady-state free precession MR imaging with two types of speed-up techniques: Comparison with two-dimensional cine imaging

Evaluation of global cardiac functional parameters using single-breath-hold three-dimensional cine steady-state free precession MR imaging with two types of speed-up techniques: Comparison with two-dimensional cine imaging

Continuous positive airway pressure alters cranial blood flow and cerebrospinal fluid dynamics at the craniovertebral junction

Motion in Cardiovascular MR Imaging

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