Endovascular repair of acute complicated type B aortic dissection-systematic review and meta-analysis of long-term survival and reintervention

Preoperative Immature Neutrophils Predict Clinical Outcomes in Patients with Uncomplicated Type-B Aortic Dissection After Thoracic Endovascular Aortic Repair

Purpose

Inflammation is a hallmark of the initial development and progression of aortic dissection. This study aimed to investigate the predictive value of preoperative neutrophils in aorta-related adverse events (AAEs) after thoracic endovascular aortic repair (TEVAR) for type B aortic dissection (TBAD).

Patients and Methods

A total of 80 patients with TBAD undergoing TEVAR were enrolled in our hospital. Preoperative inflammatory markers, including white blood cells (WBCs), neutrophils, neutrophil-to-lymphocyte ratio (NLR) and plasma high-sensitivity C-reactive protein (hs-CRP), were measured. Circulating neutrophil subpopulation was determined by flow cytometry. Kaplan-Meier curve was performed to determine whether neutrophil subsets independently predicted aorta-related adverse events (AAEs) after TEVAR.

Results

Compared with control group, the prevalence of hypertension and the levels of inflammatory indicators including WBCs, total neutrophils, NLR, immature neutrophils and hs-CRP were significantly higher in TBAD patients. Receiver operating characteristic (ROC) curve showed that NLR, absolute number of total neutrophils and percent CD10- immature neutrophils had excellent area under curves. During the 18-month follow-up, 16 (20.0%) were reported to occur AAEs, while 4 deaths (5.0%) were documented. Percent immature neutrophil was markedly higher in TBAD patients experiencing AAEs as compared with those without AAEs. Kaplan-Meier curve and Cox regression analysis demonstrated that percent immature neutrophil was the only predictor correlated with the occurrence of AAEs (hazard ratio 7.66, 95% CI: 2.91, 20.17, P = 0.018).

Conclusion

Increased CD10- immature neutrophils could act as a potential biomarker related to long-term adverse outcomes in TBAD patients following TEVAR.

Surgical timing of endoluminal repair of Stanford type B aortic coarctation and relationship to prognosis: a single-center retrospective cohort study

Background

Stanford type B aortic dissection (TBAD) is a rare cardiovascular emergency with rapid onset and great harm. Currently, no relevant studies have analyzed the difference in clinical benefits of endovascular repair in patients with TBAD in acute and non-acute stages. To investigate the clinical characteristics and prognosis of endovascular repair in patients with TBAD at different surgical timing.

Methods

The medical records of 110 patients with TBAD from June 2014 to June 2022 were retrospectively selected as the study subjects. The patients were divided into an acute group (onset time ≤14 days) and a non-acute group (onset time >14 days) according to the time to surgery, and the two groups were compared in terms of surgery and hospitalization, aortic remodeling, and follow-up results. Univariate and multivariate logistic regression were used to analyze the factors affecting the prognosis of TBAD treated with endoluminal repair.

Results

The proportion of pleural effusion, heart rate, the rate of complete thrombosis of the false lumen and the difference in the maximum diameter of the false lumen in the acute group were higher than those in the non-acute group (P=0.015, <0.001, 0.029, <0.001). The length of hospital stay and the maximum postoperative diameter of the false lumen was lower than in the non-acute group (P=0.001, 0.004). There was no statistically significant difference between the two groups in the technical success rate, overlapping stent length, overlapping stent diameter, immediate postoperative contrast type I endoleak, incidence of renal failure, ischemic disease, endoleaks, aortic dilatation, retrograde type A aortic coarctation, and death (P=0.386, 0.551, 0.093, 0.176, 0.223, 0.739, 0.085, 0.098, 0.395, 0.386); coronary artery disease [odds ratio (OR) =6.630, P=0.012], pleural effusion (OR =5.026, P=0.009), non-acute surgery (OR =2.899, P=0.037), and involvement of the abdominal aorta (OR =11.362, P=0.001) were all independent risk factors affecting the prognosis of TBAD treated with endoluminal repair.

Conclusions

Acute phase endoluminal repair of TBAD may contribute to aortic remodeling, and the prognosis of TBAD patients can be assessed clinically in combination with coronary artery disease, pleural effusion, and involvement of the abdominal aorta for early intervention to reduce the associated mortality.

13-year single-center experience with the treatment of acute type B aortic dissection

Background. Acute type B aortic dissection (TBAD) is catastrophic event associated with significant mortality and lifelong morbidity. The optimal treatment strategy of TBAD is still controversial. Methods. This analysis includes patients treated for TBAD at the Helsinki University Hospital, Finland in 2007-2019. The endpoints were early and late mortality, and intervention of the aorta. Results. There were 205 consecutive TBAD patients, 59 complicated and 146 uncomplicated patients (mean age of 66 ± 14, females 27.8%). In-hospital and 30-day mortality rates were higher in complicated patients compared with uncomplicated patients with a statistically significant difference (p = 0.035 and p = 0.015, respectively). After a mean follow-up of 4.9 ± 3.8 years, 36 (25.0%) and 22 (37.9%) TBAD -related adverse events occurred in the uncomplicated and complicated groups, respectively (p = 0.066). Freedom from composite outcome was 83 ± 3% and 69 ± 6% at 1 year, 75 ± 4% and 63 ± 7% at 5 years, 70 ± 5% and 59 ± 7% at 10 years in the uncomplicated group and in the complicated group, respectively (p = 0.052). There were 25 (39.1%) TBAD-related deaths in the overall series and prior aortic aneurysm was the only risk factor for adverse aortic-related events in multivariate analysis (HR 3.46, 95% CI 1.72-6.96, p < 0.001). Conclusion. TBAD is associated with a significant risk of early and late adverse events. Such a risk tends to be lower among patients with uncomplicated dissection, still one fourth of them experience TBAD-related event. Recognition of risk factors in the uncomplicated group who may benefit from early aortic repair would be beneficial.

Criteria for endovascular intervention in type B aortic dissection

BACKGROUND

The use of thoracic endovascular aortic repair (TEVAR) for the management of uncomplicated type B aortic dissection (un-TBAD) remains controversial. There is a lack of consensus over whether pre-emptive TEVAR should be carried out in patients with un-TBAD at risk of progression to complicated TBAD. We present a review of current evidence and seek to suggest criteria where endovascular intervention in un-TBAD may prove beneficial relative to pharmacotherapy alone.

METHODS AND MATERIALS

PubMed and Cochrane databases were searched using terms including: type B aortic dissection, risk factors, medical therapy, TEVAR, false lumen (FL) expansion, and mortality. Papers were selected based on title and abstract.

RESULTS

Optimal medical therapy remains the mainstay treatment for patients with un-TBAD, however, patients with un-TBAD present with varying degrees of disease progression risk. Factors such as age, aortic morphology, history of connective tissue disorders, FL thrombosis, and aortic branch involvement may potentiate progression from un-TBAD to complicated TBAD. Short- and long-term outcomes associated with TEVAR for TBAD remain promising.

CONCLUSION

Pre-emptive TEVAR may be beneficial in patients with un-TBAD presenting with the above factors, however, further prospective research into the optimal timing for TEVAR in un-TBAD is required.