Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
The purpose of this study is to investigate the effects of heart rates (including maximum heart rate, average heart rate and minimum heart rate) and variability of heart rate on image quality of DSCT coronary angiography without control of heart rate experienced in our department.
The dual-source CT (DSCT) equipped with two X-ray tubes at 90 degree offset in the gantry can provide temporal resolution 83ms using mono-segmental reconstruction technique. The recent studies about the effect of heart rate on IQ of DSCT coronary angiography which concluded in adequate diagnostic IQ of dual-source CTCA without immediate pre-scanning heart rate control included chronic users of β-blocker focused on the influences of average heart rate, heart rate variability and coronary arterial calcifications on IQ. The effect of blooming artifact of calcification on IQ by far cannot be eliminated. Here, we investigate the effects of maximum heart rate, average heart rate, minimum heart rate and heart rate variability on the motion-related IQ of DSCT coronary angiography in patients without both pre-scanning heart rate control and chronic use of β-blocker agent, compared with that in chronic users of β-blocker agents.
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
| Measure | Description | Time Frame |
|---|---|---|
| Compare the effects of the heart rate variables on motion-related image qualities of DSCT coronary angiography between the group 1 patients of chronic beta-blocker users and the group 2 patients without medication of any heart-rate lowering agent. | About two months |
| Measure | Description | Time Frame |
|---|---|---|
| Kappa Statistics, Descriptive Statistics, Chi-square test, Independent t-test, Pearson's correlation and linear regression method for statistic analysis. | About two to three months |
Not provided
Inclusion Criteria:
Exclusion Criteria:
Not provided
Not provided
The patients or examined persons from Taiwan.
Not provided
| Name | Affiliation | Role |
|---|---|---|
| Wing-Keung Cheung, MD, CCD | Far Eastern Memorial Hospital | Principal Investigator |
| Kao-Lun Wang, MD | Far Eastern Memorial Hospital | Study Chair |
| Chen-I Yen, BSc | Far Eastern Memorial Hospital | Study Chair |
| Shu-Lin Tsen, BSc | Far Eastern Memorial Hospital | Study Chair |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Department of Medical Imaing, Far Eastern Memorial Hospital | Banqiao District | Taipei | 200 | Taiwan |
| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 17620936 | Background | Leschka S, Scheffel H, Desbiolles L, Plass A, Gaemperli O, Valenta I, Husmann L, Flohr TG, Genoni M, Marincek B, Kaufmann PA, Alkadhi H. Image quality and reconstruction intervals of dual-source CT coronary angiography: recommendations for ECG-pulsing windowing. Invest Radiol. 2007 Aug;42(8):543-9. doi: 10.1097/RLI.0b013e31803b93cf. | |
| 16426789 |
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
No biospecimens
| Achenbach S, Ropers D, Kuettner A, Flohr T, Ohnesorge B, Bruder H, Theessen H, Karakaya M, Daniel WG, Bautz W, Kalender WA, Anders K. Contrast-enhanced coronary artery visualization by dual-source computed tomography--initial experience. Eur J Radiol. 2006 Mar;57(3):331-5. doi: 10.1016/j.ejrad.2005.12.017. Epub 2006 Jan 19. |
| 16770652 | Result | Johnson TR, Nikolaou K, Wintersperger BJ, Leber AW, von Ziegler F, Rist C, Buhmann S, Knez A, Reiser MF, Becker CR. Dual-source CT cardiac imaging: initial experience. Eur Radiol. 2006 Jul;16(7):1409-15. doi: 10.1007/s00330-006-0298-y. Epub 2006 May 13. |
| 17715102 | Result | Matt D, Scheffel H, Leschka S, Flohr TG, Marincek B, Kaufmann PA, Alkadhi H. Dual-source CT coronary angiography: image quality, mean heart rate, and heart rate variability. AJR Am J Roentgenol. 2007 Sep;189(3):567-73. doi: 10.2214/AJR.07.2078. |