Analysis of coronary blood flow velocity dynamics in angiographically normal and stenosed arteries before and after endolumen enlargement by angioplasty.

@article{Ofili1993AnalysisOC,
  title={Analysis of coronary blood flow velocity dynamics in angiographically normal and stenosed arteries before and after endolumen enlargement by angioplasty.},
  author={Elizabeth O. Ofili and Morton J Kern and Arthur J. Labovitz and J A St Vrain and Jerome Segal and Frank V. Aguirre and Ramon Castello},
  journal={Journal of the American College of Cardiology},
  year={1993},
  volume={21 2},
  pages={
          308-16
        }
}
OBJECTIVES This study was designed to assess whether the spectral waveform of coronary velocity on Doppler study is characteristically altered in the presence of significant stenosis with normalization of the spectral waveform after relief of endolumen obstruction. [...] Key Method Proximal and distal flow velocity measurements were also obtained before and after angioplasty of the 29 abnormal arteries.Expand
Applications of coronary flow velocity during angioplasty and other coronary interventional procedures.
  • J. Segal
  • Medicine
  • The American journal of cardiology
  • 1993
TLDR
Measurement of blood flow velocity, flow reserve, and the phasic diastolic/systolic velocity ratio in the distal coronary artery has been performed following various interventional procedures utilizing a low profile Doppler angioplasty guidewire to prove useful in clinical decision making. Expand
Blood flow velocity in the right coronary artery: assessment before and after angioplasty.
TLDR
Rest phasic Doppler flow velocity indexes are not useful for evaluating stenoses in the right coronary artery proper before or after angioplasty, and diastolic predominant flow is observed in the posterior descending and posterolateral coronary arteries. Expand
Coronary flow velocity dynamics in normal and diseased arteries.
TLDR
The coronary vasodilator reserve in proximal and distal arteries--in addition to the proximal to distal velocity ratio--may provide functional and hemodynamic data complementary to coronary angiography in the assessment of coronary artery stenosis. Expand
Assessment of angiographically intermediate coronary artery stenosis using the Doppler flowire.
TLDR
Spectral flow velocity data, using an 0.018-in intracoronary Doppler-tipped angioplasty guidewire, were compared to translesional pressure gradients and angiography during cardiac catheterization to determine the physiologic significance of coronary stenoses. Expand
Coronary arterial flow-velocity dynamics in children with angiographically normal coronary arteries.
TLDR
The phasic coronary flow-velocity patterns at rest and during peak hyperemic responses in children with angiographically normal coronary arteries are examined to demonstrate that there are some characteristic findings in CFV dynamics in childhood. Expand
Distal coronary flow velocity immediately after direct angioplasty for acute myocardial infarction.
TLDR
The extent of disturbed microcirculation can be evaluated by assessing phasic flow after direct angioplasty for acute infarction by assessing the determinants of flow-velocity variables in the infarct artery. Expand
Coronary blood flow velocities during rotational atherectomy.
TLDR
Doppler derived distal coronary blood flow velocities increased following rotational ablation and adjunctive balloon angioplasty, with resolution of transstenotic velocity gradient, and changes in distal phasic velocity pattern and coronary flow reserve were not useful in the assessment of the functional outcome. Expand
Doppler Flow Velocity Measurements During Coronary Angioplasty
TLDR
Prestenotic and poststenotic measurements of coronary artery flow velocity differed significantly before and after PTCA and offer the potential for estimating both the hemodynamic relevance of coronary arteries stenoses and success of P TCA. Expand
Assessing the hemodynamic significance of coronary artery stenoses: analysis of translesional pressure-flow velocity relations in patients.
TLDR
Translesional coronary flow velocity is a new and easily applicable method for determining the hemodynamic significance of coronary artery stenoses that is superior to angiography and can be applied at the time of diagnostic catheterization. Expand
Differential characterization of blood flow, velocity, and vascular resistance between proximal and distal normal epicardial human coronary arteries: analysis by intracoronary Doppler spectral flow velocity.
TLDR
The demonstrated inverse and curvilinear (polynomial) relation between volumetric flow and vascular resistance agrees with theoretical and animal models of coronary physiologic characteristics and suggests a nadir of coronary vascular resistance below which coronary flow no longer increases. Expand
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References

SHOWING 1-10 OF 42 REFERENCES
Alterations of phasic coronary artery flow velocity in humans during percutaneous coronary angioplasty.
TLDR
Flow velocity measurements may be performed distal to a coronary stenosis with the Doppler guide wire and changes in distal flow velocity patterns and diastolic/systolic velocity ratio appeared to be more relevant than the hyperemic response in assessing the immediate physiologic outcome of coronary angioplasty. Expand
Subselective measurement of coronary blood flow velocity using a steerable Doppler catheter.
TLDR
The 3F Doppler coronary catheter is nonobstructing, steerable and safe, there is an excellent correlation of blood flow velocity with volume collections, and the catheter provides a reliable method of determining coronary blood flow Velocity and coronary vasodilator reserve. Expand
Impaired coronary vasodilator reserve in the immediate postcoronary angioplasty period: analysis of coronary artery flow velocity indexes and regional cardiac venous efflux.
TLDR
The data indicate that maximal hyperemic coronary flow velocity is increased after angioplasty, but the reserve ratios, calculated by any of several flow velocity indexes, remain minimally improved. Expand
Analysis of flow characteristics in poststenotic regions of the human coronary artery during bypass graft surgery.
TLDR
The velocity configuration in the poststenotic portions was characterized by the presence of reverse flow velocities and/or irregularity of the velocity pattern near the vessel wall, indicating the existence of flow separation and recirculation in the regions. Expand
Transluminal, subselective measurement of coronary artery blood flow velocity and vasodilator reserve in man.
TLDR
The developed and validated a small Doppler catheter that can subselectively measure phasic coronary blood flow velocity (CBFV) and assessing vasodilator reserve in the catheterization laboratory should facilitate studies of the coronary circulation in man. Expand
Assessment of severity of coronary stenoses using a Doppler catheter. Validation of a method based on the continuity equation.
TLDR
A new method based on the continuity equation using a Doppler catheter for the assessment of stenosis severity in the coronary circulation by means of quantitative velocity measurements obtained by complex spectral analysis of the Dopplers signal is developed. Expand
Validation of a Doppler Guide Wire for Intravascular Measurement of Coronary Artery Flow Velocity
TLDR
The Doppler guide wire measures phasic flow velocity patterns and linearly tracks changes in flow rate in small, straight coronary arteries and should facilitate measurement ofphasic coronary flow velocity during coronary angiography and angioplasty. Expand
The effect of coronary angioplasty on coronary flow reserve.
TLDR
It is demonstrated that in one-half of patients there is a transient reduction in coronary flow reserve immediately after angioplasty, which may not reflect the eventual success of the procedure in removing physiologic obstruction to coronary blood flow. Expand
The value of lesion cross-sectional area determined by quantitative coronary angiography in assessing the physiologic significance of proximal left anterior descending coronary arterial stenoses.
TLDR
This study was performed to determine whether other parameters of lesion severity could predict the reactive hyperemic response and thus the hemodynamic significance of coronary stenoses in human beings. Expand
Prediction of the physiologic significance of coronary arterial lesions by quantitative lesion geometry in patients with limited coronary artery disease.
TLDR
CFR measured at angiography in patients with discrete, limited coronary artery disease correlates closely with luminal stenosis determined precisely with quantitative coronaryAngiography, suggesting differences in the extent of diffuse arterial narrowing may account for these discrepancies. Expand
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