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001-es BibID:	BIBFORM037173
Első szerző:	Kőszegi Zsolt (kardiológus, belgyógyász)
Cím:	Calculation the Translesional Pressure Gradients on Coronary Stenosis by Combining Three-dimensional Coronary Angiography Parameters with Frame Count Data / Kőszegi Zs., Tar B., Ember S., Lugosi P., Béres Z., Sánta J., Sváb M., Bakk S., Kolozsvári R., Polgár P.
Dátum:	2011
Megjegyzések:	Background: Assessing the hemodynamic impact of anintermediate coronary artery stenosis on the basis of thediameter stenosis is often ambiguous. Measurement of thefractional flow reserve (FFR) is necessary in these casesfor correct clinical decision making.Aim: Determining the tranlesional pressure gradients,based on the data calculated from the 3D coronaryangiography and the frame count method using classicfluid dynamic equations and to compare them with themeasured values.Methods: FFR measurements were performed on 15coronary segments of 10 patients by PressureWire?Certus. 3D reconstructions of the same segments wereperformed by the IC30 software (Siemens), and the crosssectionalarea stenosis (AS) (%), the length of the lesion(L) (mm), the minimal lumen area (MLA) (mm2), theplaque volume (PV) (%) and the distal reference area(dRefA) (mm2) were determined. The flow velocity (mm/s)was assessed by the frame count on the coronaryangiography following administration of 6 ml contrastmaterial with a 3ml/s rate by ACIST? Injection System(BBraun). Vessel length was determined on the 3Dreconstruction. Pressure gradients (Hgmm) werecalculated on the basis of the fluid dynamic equations:dP= Q(Rp+QRt), where Rp= 0,75 x L / MLA2and Rt = 3,76x (1/MLA - 1/dRef A)2,Q(volumetric flow)(ml/s) = flow velocity x dRefA.Results: Regression analysis has demonstratedsignificant relationship between the calculated andmeasured resting distal/proximal pressure ratio (r=0.66;p=0.007). Tight correlation has been found between thecalculated and measured FFR (assuming twofoldvolumetric flow during vasodilatation) (r=0.88;p<0.001). Among the 3D parameters only the AS and thePV showed significant correlation with the FFR (r=0.62and 0.71; p=0.013 and 0.003, respectively).Conclusions: The calculation of pressure gradients byfluid dynamic equations using 3D coronary angiographyand frame count data can predict the functional flowconsequence of a stenosis.
Tárgyszavak:	Orvostudományok Klinikai orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban FFR measurements IC30 software
Megjelenés:	Computing in Cardiology [electronic resource]. - 38 (2011), p. 729-732. -
További szerzők:	Tar B. Ember Sándor Lugosi P. Béres Z. Sánta J. Sváb Marianna Bakk Sándor Kolozsvári Rudolf (1976-) (kardiológus) Polgár Péter
Internet cím:	Intézményi repozitóriumban (DEA) tárolt változat Szerző által megadott URL
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001-es BibID:	BIBFORM076167
Első szerző:	Szabó Gábor Tamás (kardiológus)
Cím:	Integration of Standard Myocardial and Epicardial Segmentation : validation by Computed Tomography and Autopsy Studies / Szabó Gábor, Veisz Richárd, Gergely Péter, Balkay László, Herczeg László, Varga J., Kolozsvári Rudolf, Ungvári T., Rácz Ildikó, Édes István, Kőszegi Zsolt
Dátum:	2009
Megjegyzések:	Background: The epicardial coronary segmentations have not established the relation between the epicardial branches and the supplied myocardial segments Methods: The coronary angiograms of 37 patients were analyzed by a computer program called Holistic Coronary Care. Results: The analysis of the coronary angiograms showed that out of the 17 left ventricular segments 9.5?1.9, 3.3?2.4 and 4.2?2.5 were supplied by the left anterior descending, the left circumflex and the right coronary artery, respectively. A highly significant correlation was found between the angiographic and both the CT and the autopsy determination of the number of left ventricular segments (r=0.97 and 0.94, p<0.001). Conclusions: Coronary angiography from multiple projections can determine accurately the supplied left ventricular segments of the 3 main coronary branches.
Tárgyszavak:	Orvostudományok Klinikai orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk
Megjelenés:	Computers in Cardiology. - 36 (2009), p. 349-351. -
További szerzők:	Veisz Richárd Gergely Péter (1974-) (igazságügyi orvosszakértő) Balkay László (1963-) (biofizikus) Herczeg László (1954-) (igazságügyi orvosszakértő) Varga József (1955-) (fizikus) Kolozsvári Rudolf (1976-) (kardiológus) Ungvári T. Rácz Ildikó (1973-) (kardiológus) Édes István (1952-) (kardiológus) Kőszegi Zsolt (1962-) (kardiológus, belgyógyász)
Internet cím:	Szerző által megadott URL Intézményi repozitóriumban (DEA) tárolt változat
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