Abstract
Angiography (or fluoroscopy) is essential for guidance during transcatheter aortic valve replacement (TAVR); however its utility to assess aortic annulus dimension is not well established. Only a few small-scale studies have compared angiographic measurements with other imaging modalities. In general, they have observed moderate correlation with multidetector row CT (MDCT) and transesophageal echocardiography (TEE). However intra- and interobserver reproducibility was only moderate with angiography and inferior to other modalities. Newer technology—such as the Paieon’s C-THV system—has been developed to help identify adequate perpendicular views to the annulus to facilitate accurate deployment and has been shown to be effective. Rotational angiography has been recently applied to TAVR, and preliminary data suggest a possible role for evaluation of aortic annulus dimensions as well as enhanced placement accuracy but more robust studies are needed. Rotational angiography has, however, been demonstrated to predict optimal projection angles reliably, with less radiation than MDCT and with limited use of iodinated contrast. These factors suggest the use of angiography and rotational angiography to be useful for assessment of aortic dimension and determination of optimal projection angles.
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Abbreviations
- LAO:
-
Left anterior oblique
- LVOT:
-
Left ventricular outflow tract
- MDCT:
-
Multidetector computed tomography
- MRI:
-
Magnetic resonance imaging
- RAO:
-
Right anterior oblique
- STJ:
-
Sinotubular junction
- TAVR:
-
Transcatheter aortic valve replacement
- TEE:
-
Transesophageal echocardiogram
- THV:
-
Transcatheter heart valve
- TTE:
-
Transthoracic echocardiogram
- 2D:
-
2-dimensional
- 3D:
-
3-dimensional
- 3DA:
-
3-dimensional angiography
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Daneault, B., Moses, J.W. (2014). Angiography and Rotational Angiography for TAVR. In: Min, J., Berman, D., Leipsic, J. (eds) Multimodality Imaging for Transcatheter Aortic Valve Replacement. Springer, London. https://doi.org/10.1007/978-1-4471-2798-7_30
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DOI: https://doi.org/10.1007/978-1-4471-2798-7_30
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