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Intracardiac shunts following transcatheter aortic valve implantation: a multicentre study.

EuroIntervention 2018 April 21
AIMS: The aim of this study was to describe the incidence, mechanisms, management and outcomes of intracardiac shunts (ICS) following TAVI.

METHODS AND RESULTS: This was a multicentre registry across 10 centres aimed at gathering all cases of ICS (1.1%) including infection-related (IRICS, 0.3%) or aseptic (AICS, 0.8%) shunts. Patients presented porcelain aorta (24% vs. 6.8%, p=0.024) and had been treated with predilation (88% vs. 68.5%, p=0.037) or post-dilation (59.1% vs. 19.3%, p<0.001) more often. Median time from intervention to diagnosis of ICS was 10 days (IQR: 2-108), being longer for IRICS (171 [63-249] vs. 3 [1-12] days, p=0.002). Interventricular septum (55.6%) and anterior mitral leaflet (57.2%) were the most common locations for AICS and IRICS, respectively. Most patients (76%) developed heart failure but 64% were medically managed. Seven patients (38.9%) underwent percutaneous closure of AICS. The in-hospital mortality rate was 44% (IRICS 100%, AICS 27.8%) compared to global TAVI recipients (8.1%, p<0.001). At one-year follow-up, 76% of the patients had died. ICS, logistic EuroSCORE, and moderate-severe residual aortic regurgitation were independent predictors of death.

CONCLUSIONS: Post-TAVI ICS are an uncommon complication independently associated with high early mortality. Currently, most therapeutic alternatives yield poor results but percutaneous closure of AICS was feasible and is a promising alternative.

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