Changes in Phasic Coronary Blood Flow Velocity Profile in Relation to Changes in Hemodynamic Parameters During Stress in Patients With Aortic Valve Stenosis

Circulation ◽  
1995 ◽  
Vol 92 (6) ◽  
pp. 1437-1447 ◽  
Author(s):  
Panaghiotis N. Petropoulakis ◽  
Michael K. Kyriakidis ◽  
Costas A. Tentolouris ◽  
Costas V. Kourouclis ◽  
Pavlos K. Toutouzas
Keyword(s):  
Blood Flow ◽  
Aortic Valve ◽  
Velocity Profile ◽  
Flow Velocity ◽  
Coronary Blood Flow ◽  
Blood Flow Velocity ◽  
Hemodynamic Parameters ◽  
Flow Velocity Profile ◽  
Phasic Coronary Blood Flow ◽  
Coronary Blood Flow Velocity

Changes in Phasic Coronary Blood Flow Velocity Profile and Relative Coronary Flow Reserve in Patients With Hypertrophic Obstructive Cardiomyopathy

Circulation ◽  
1997 ◽  
Vol 96 (3) ◽  
pp. 834-841 ◽  
Author(s):  
Michael K. Kyriakidis ◽  
John M. Dernellis ◽  
Aristides E. Androulakis ◽  
Glafkos A. Kelepeshis ◽  
John Barbetseas ◽  
...  
Keyword(s):  
Blood Flow ◽  
Velocity Profile ◽  
Flow Velocity ◽  
Blood Flow Velocity ◽  
Coronary Flow ◽  
Hypertrophic Obstructive Cardiomyopathy ◽  
Flow Reserve ◽  
Flow Velocity Profile ◽  
Phasic Coronary Blood Flow ◽  
Coronary Blood Flow Velocity

Influence of Type of Aortic Valve Prosthesis on Coronary Blood Flow Velocity

2013 ◽  
Vol 16 (1) ◽  
pp. 8 ◽  
Author(s):  
Matija Jelenc ◽  
Katja Ažman Juvan ◽  
Nadja Tatjana Ružič Medvešček ◽  
Borut Geršak
Keyword(s):  
Blood Flow ◽  
Aortic Valve ◽  
Velocity Profile ◽  
Flow Velocity ◽  
Coronary Blood Flow ◽  
Blood Flow Velocity ◽  
Valve Prosthesis ◽  
Jude Medical ◽  
Aortic Valve Prosthesis ◽  
Blood Flow Velocities

<strong>Background</strong>: Severe aortic valve stenosis is associated with high resting and reduced hyperemic coronary blood flow. Coronary blood flow increases after aortic valve replacement (AVR); however, the increase depends on the type of prosthesis used. The present study investigates the influence of type of aortic valve prosthesis on coronary blood flow velocity.<br /><strong>Methods</strong>: The blood flow velocity in the left anterior descending coronary artery (LAD) and the right coronary artery (RCA) was measured intraoperatively before and after AVR with a stentless bioprosthesis (Sorin Freedom Solo; n = 11) or a bileaflet mechanical prosthesis (St. Jude Medical Regent; n = 11). Measurements were made with an X-Plore epicardial Doppler probe (Medistim, Oslo, Norway) following induction of hyperemia with an adenosine infusion. Preoperative and postoperative echocardiography evaluations were used to assess valvular and ventricular function. Velocity time integrals (VTI) were measured from the Doppler signals and used to calculate the proportion of systolic VTI (SF), diastolic VTI (DF), and normalized systolic coronary blood flow velocities (NSF) and normalized diastolic coronary blood flow velocities (NDF).<br /><strong>Results</strong>: The systolic proportion of the LAD VTI increased after AVR with the St. Jude Medical Regent prosthesis, which produced higher LAD SF and NSF values than the Sorin Freedom Solo prosthesis (SF, 0.41 ± 0.09 versus 0.29 ± 0.13 [P = .04]; NSF, 0.88 ± 0.24 versus 0.55 ± 0.17 [P = .01]). No significant changes in the LAD velocity profile were noted after valve replacement with the Sorin Freedom Solo, despite a significant reduction in transvalvular gradient and an increase in the effective orifice area. AVR had no effect on the RCA flow velocity profile.<br /><strong>Conclusion</strong>: The coronary flow velocity profile in the LAD was significantly influenced by the type of aortic valve prosthesis used. The differences in the LAD velocity profile probably reflect differences in valve design and the systolic transvalvular flow pattern.

scholarly journals Phasic coronary blood flow velocity pattern and flow reserve in the atrium: regulation of left atrial myocardial perfusion

2003 ◽  
Vol 41 (4) ◽  
pp. 674-680 ◽  
Author(s):  
Emmanuel I Skalidis ◽  
George E Kochiadakis ◽  
Nikolaos E Igoumenidis ◽  
Konstantinos E Vardakis ◽  
Panos E Vardas
Keyword(s):  
Blood Flow ◽  
Myocardial Perfusion ◽  
Flow Velocity ◽  
Coronary Blood Flow ◽  
Blood Flow Velocity ◽  
Left Atrial ◽  
Velocity Pattern ◽  
Flow Reserve ◽  
Phasic Coronary Blood Flow ◽  
Coronary Blood Flow Velocity

Alternation in the Coronary Blood Flow Velocity Pattern in Patients With No Reflow and Reperfused Acute Myocardial Infarction

Circulation ◽  
1996 ◽  
Vol 94 (6) ◽  
pp. 1269-1275 ◽  
Author(s):  
Katsuomi Iwakura ◽  
Hiroshi Ito ◽  
Shin Takiuchi ◽  
Yoshiaki Taniyama ◽  
Yoshiaki Nakatsuchi ◽  
...  
Keyword(s):  
Myocardial Infarction ◽  
Acute Myocardial Infarction ◽  
Blood Flow ◽  
Flow Velocity ◽  
Coronary Blood Flow ◽  
Blood Flow Velocity ◽  
Velocity Pattern ◽  
No Reflow ◽  
Reperfused Acute Myocardial Infarction ◽  
Coronary Blood Flow Velocity

scholarly journals Effects of Isoflurane on Coronary Blood Flow Velocity in Young, Old and ApoE−/− Mice Measured by Doppler Ultrasound

2007 ◽  
Vol 33 (4) ◽  
pp. 512-521 ◽  
Author(s):  
Craig J. Hartley ◽  
Anilkumar K. Reddy ◽  
Sridhar Madala ◽  
Lloyd H. Michael ◽  
Mark L. Entman ◽  
...  
Keyword(s):  
Blood Flow ◽  
Flow Velocity ◽  
Coronary Blood Flow ◽  
Doppler Ultrasound ◽  
Blood Flow Velocity ◽  
Young Old ◽  
Coronary Blood Flow Velocity

Biphasic Cerebral Blood Flow Velocity Profile in Patients With Aneurysmal Subarachnoid Hemorrhage

2004 ◽  
Vol 1 (4) ◽  
pp. 455-460 ◽  
Author(s):  
Andreas R. Luft ◽  
Manuel M. Buitrago ◽  
Michel Torbey ◽  
Anish Bhardwaj ◽  
Alexander Razumovsky
Keyword(s):  
Blood Flow ◽  
Cerebral Blood Flow ◽  
Subarachnoid Hemorrhage ◽  
Velocity Profile ◽  
Flow Velocity ◽  
Blood Flow Velocity ◽  
Cerebral Blood Flow Velocity ◽  
Aneurysmal Subarachnoid Hemorrhage ◽  
Flow Velocity Profile

scholarly journals Immediate and Long-Term Effect of Balloon Angioplasty or Stent Implantation on the Absolute and Relative Coronary Blood Flow Velocity Reserve

Circulation ◽  
1998 ◽  
Vol 98 (20) ◽  
pp. 2133-2140 ◽  
Author(s):  
Rob A. M. van Liebergen ◽  
Jan J. Piek ◽  
Karel T. Koch ◽  
Robbert J. de Winter ◽  
Kong I. Lie
Keyword(s):  
Blood Flow ◽  
Flow Velocity ◽  
Coronary Blood Flow ◽  
Balloon Angioplasty ◽  
Blood Flow Velocity ◽  
Stent Implantation ◽  
Term Effect ◽  
Long Term Effect ◽  
Coronary Blood Flow Velocity
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