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Published on: February 28, 2012
Outcomes of Adding Computed Tomography Angiography for Pre-procedural Planning of Left Atrial Appendage Occlusion: a
Vinicius Pereira1, Julia Fernandes2, Rafael Petri Santos Pinheiro3
1Facultad de Ciencias Biomédicas, Universidad Austral, Pilar, Buenos Aires, Argentina.
Insights
Adding cardiac computed tomography angiography (CCTA) to transesophageal echocardiography (TEE) for left atrial appendage occlusion (LAAO) planning improves procedural success. This meta-analysis confirms the benefit of combined imaging for LAAO procedures.
Area of Science:
- Cardiology
- Medical Imaging
- Interventional Procedures
Background:
- Current guidelines recommend transesophageal echocardiography (TEE) or cardiac computed tomography angiography (CCTA) for pre-procedural planning of catheter-based left atrial appendage occlusion (LAAO).
- Limited evidence exists comparing the procedural outcomes of adding CCTA to TEE versus TEE alone for LAAO planning.
Purpose of the Study:
- To conduct a systematic review and meta-analysis evaluating the impact of incorporating CCTA into TEE for pre-procedural LAAO planning.
- To determine if the addition of CCTA to TEE enhances procedural success rates in LAAO.
Main Methods:
- A systematic literature search was performed across Cochrane, Embase, and Medline databases.
- Included observational studies and randomized controlled trials (RCTs) comparing CCTA + TEE versus TEE alone for LAAO.
- Procedural success was the primary endpoint, with data pooled using a random-effects model to calculate risk ratios (RRs) and 95% confidence intervals (CIs).
Main Results:
- Four studies (3 RCTs, 1 observational) involving 824 patients were included in the meta-analysis.
- The pooled analysis revealed a higher procedural success rate when CCTA was added to TEE (RR 1.10; 95% CI 1.01-1.19; p=0.022).
- Subgroup analysis of RCTs alone showed a similar trend with a higher magnitude of effect (RR 1.15; 95% CI 1.06-1.25).
Conclusions:
- Adding CCTA to TEE for pre-procedural planning in LAAO is associated with improved procedural success.
- The findings support the utility of combined CCTA and TEE imaging for optimizing LAAO procedures.
- Further research may refine optimal imaging strategies for LAAO based on these results.
Background:
Multi-society expert consensus statements on catheter-based left atrial appendage occlusion (LAAO) suggest transesophageal echocardiography (TEE) or cardiac computed tomography angiography (CCTA) for pre-procedural planning. However, evidence comparing the outcomes of adding CCTA to TEE on procedural success is limited.
Objective:
Perform a systematic review and meta-analysis to determine the impact of adding CCTA to TEE for pre-procedural planning in patients undergoing LAAO.
Methods:
We systematically searched Cochrane, Embase, and Medline for observational studies and randomized controlled trials (RCTs) comparing the addition of CCTA vs. TEE alone. The primary endpoint was procedural success. Risk ratios (RRs) with 95% confidence intervals (CIs) were pooled across studies using a random-effects model.
Results:
Systematic review identified four studies for meta-analysis, three RCTs and one observational study, including a total of 824 patients, of whom 496 (60.2%) underwent additional CCTA. In the pooled analysis, procedural success was higher with added CCTA (RR 1.10; 95% CI 1.01-1.19; p = 0.022; I²=52%). A subgroup analysis of only RCTs confirmed these findings with a slightly higher magnitude of effect and lower heterogeneity (RR 1.15; 95% CI: 1.06-1.25; I2 = 0%).
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