TY - JOUR
T1 - CT imaging prior to transcatheter aortic valve implantation in the UK
AU - Harries, Iwan
AU - Weir-Mccall, Jonathan R.
AU - Williams, Michelle C.
AU - Shambrook, James
AU - Roditi, Giles
AU - Bull, Russel
AU - Morgan-Hughes, Gareth J.
AU - Nicol, Edward D.
AU - Moss, Alastair J.
N1 - This study was supported by a grant from the British Society of Cardiovascular Imaging/British Society of Cardiac Computed Tomography. The British Society of Cardiovascular Imaging/British Society of Cardiac Computed Tomography is a registered charity (1145324).
PY - 2020/4/6
Y1 - 2020/4/6
N2 - Objective: This cross-sectional observational study sought to describe variations in CT in the context of transcatheter aortic valve implantation (CT-TAVI) as currently performed in the UK.Methods: 408 members of the British Society of Cardiovascular Imaging were invited to complete a 27-item online CT-TAVI survey.Results: 47 responses (12% response rate) were received from 40 cardiac centres, 23 (58%) of which performed TAVI on-site (TAVI centres). Only six respondents (13%) performed high-volume activity (>200 scans per year) compared with 13 (28%) performing moderate (100-200 scans per year) and 27 (59%) performing low (0-99 scans per year) volume activity. Acquisition protocols varied (41% retrospective, 12% prospective with wide padding, 47% prospective with narrow padding), as did the phase of reporting (45% systolic, 37% diastolic, 11% both, 6% unreported). Median dose length product was 675 mGy.cm (IQR 477-954 mGy.cm). Compared with non-TAVI centres, TAVI centres were more likely to report minimum iliofemoral luminal diameter (n=25, 96% vs n=7, 58%, p=0.003) and optimal tube angulation for intervention (n=12, 46% vs n=1, 8%, p=0.02).Conclusions: This national survey formally describes current CT-TAVI practice in the UK. High-volume activity was only present at one in seven cardiac CT centres. There is wide variation in scan acquisition, scan reporting and radiation dose exposure in cardiac CT centres.
AB - Objective: This cross-sectional observational study sought to describe variations in CT in the context of transcatheter aortic valve implantation (CT-TAVI) as currently performed in the UK.Methods: 408 members of the British Society of Cardiovascular Imaging were invited to complete a 27-item online CT-TAVI survey.Results: 47 responses (12% response rate) were received from 40 cardiac centres, 23 (58%) of which performed TAVI on-site (TAVI centres). Only six respondents (13%) performed high-volume activity (>200 scans per year) compared with 13 (28%) performing moderate (100-200 scans per year) and 27 (59%) performing low (0-99 scans per year) volume activity. Acquisition protocols varied (41% retrospective, 12% prospective with wide padding, 47% prospective with narrow padding), as did the phase of reporting (45% systolic, 37% diastolic, 11% both, 6% unreported). Median dose length product was 675 mGy.cm (IQR 477-954 mGy.cm). Compared with non-TAVI centres, TAVI centres were more likely to report minimum iliofemoral luminal diameter (n=25, 96% vs n=7, 58%, p=0.003) and optimal tube angulation for intervention (n=12, 46% vs n=1, 8%, p=0.02).Conclusions: This national survey formally describes current CT-TAVI practice in the UK. High-volume activity was only present at one in seven cardiac CT centres. There is wide variation in scan acquisition, scan reporting and radiation dose exposure in cardiac CT centres.
KW - aortic valve disease
KW - CT scanning
KW - percutaneous valve therapy
UR - http://www.scopus.com/inward/record.url?scp=85083452586&partnerID=8YFLogxK
U2 - 10.1136/openhrt-2019-001233
DO - 10.1136/openhrt-2019-001233
M3 - Article
C2 - 32518659
AN - SCOPUS:85083452586
SN - 2398-595X
VL - 7
JO - Open Heart
JF - Open Heart
IS - 1
M1 - e001233
ER -