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Benjamin Gory, Mikael Mazighi, Raphael Blanc, Julien Labreuche, Michel Piotin, Francis Turjman and Bertrand Lapergue

OBJECTIVE

Several randomized trials have been focused on patients with anterior circulation stroke, whereas few data on posterior circulation stroke are available. Thus, new mechanical thrombectomy (MT) strategies, including a direct-aspiration first-pass technique (ADAPT), remain to be evaluated in basilar artery occlusion (BAO) patients. The authors here assessed the influence of reperfusion on outcome in BAO patients and examined whether ADAPT improves the reperfusion rate compared with stent retriever devices.

METHODS

Three comprehensive stroke centers prospectively collected individual data from BAO patients treated with MT. Baseline characteristics as well as radiographic and clinical outcomes were compared between the 2 MT strategies. The primary outcome measure was the rate of successful reperfusion, defined as a modified Thrombolysis in Cerebral Infarction (mTICI) grade of 2b–3. Favorable outcome was defined as a 90-day modified Rankin Scale score of 0–2.

RESULTS

Among the 100 adult patients included in the study, 46 were treated with first-line ADAPT (median age 61 years, IQR 53–71 years; stent-retriever rescue therapy was secondarily used in 12 [26.1%]) and 54 were treated with a primary stent retriever (median age 67 years, IQR 53–78 years). There was no difference in baseline characteristics between the 2 treatment groups, except for the rate of diabetes (19.6% vs 5.7%, respectively, p = 0.035). Successful reperfusion was achieved in 79% of the overall study sample. Overall, the rate of favorable outcome was 36.8% and 90-day all-cause mortality was 44.2%. Successful reperfusion positively impacted favorable outcome (OR 4.57, 95% CI 1.24–16.87, p = 0.023). A nonsignificant trend toward a higher successful reperfusion rate (unadjusted OR 2.56, 95% CI 0.90–7.29, p = 0.071) and a significantly higher rate of complete reperfusion (mTICI grade 3; unadjusted OR 2.59, 95% CI 1.14–5.86, p = 0.021) was found in the ADAPT group. The procedure duration was also significantly lower in the ADAPT group (median 45 minutes, IQR 34 to 62 minutes vs 56 minutes, IQR 40 to 90 minutes; p = 0.05), as was the rate of periprocedural complications (4.3% vs 25.9%, p = 0.003). Symptomatic intracranial hemorrhage (0.0% vs 4.0%, p = 0.51) and 90-day all-cause mortality (46.7% vs 42.0%, p = 0.65) were similar in the 2 groups.

CONCLUSIONS

Among BAO patients, successful reperfusion is a strong predictor of a 90-day favorable outcome, and the choice of ADAPT as the first-line strategy achieves a significantly higher rate of complete reperfusion with a shorter procedure duration.

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Vincent Costalat, Igor Lima Maldonado, Jean-François Vendrell, Carlos Riquelme, Paolo Machi, Charles Arteaga, Francis Turjman, Hubert Desal, Jacques Sedat and Alain Bonafé

Object

The limitations of the medical management of symptomatic intracranial arterial stenosis (SIAS) have encouraged the development of new strategies, such as endovascular treatment. In this study, the authors report and analyze a series of 63 endovascular procedures in which the Wingspan stent system was used.

Methods

Data from 60 patients presenting with refractory SIAS, treated in 5 French neurointerventional centers between September 2006 and August 2009, were retrieved. An angiogram was systematically obtained 6 months after the procedure and yearly thereafter. The clinical neurological status was assessed and reported using the modified Rankin scale at 1-month, 6-month, and 1-year follow-up visits.

Results

A total of 63 stenotic lesions was treated. The mean age of the patients was 65.3 years, and the mean diameter of the stenosis was 80.2%. Technical success was achieved in 95.2% of cases. The overall incidence of procedural complications was 20.6%, with a 4.8% rate of permanent postoperative morbidity and death. In-stent restenosis (ISR)/occlusion occurred in 11 cases (17.4%), of which 10 were asymptomatic and 9 were detected less than 1 year from the endovascular treatment. In 1 case, the patient presented with a recurrent transient ischemic attack and was treated again with angioplasty. The mean follow-up was 13.2 months.

Conclusions

Endovascular treatment of SIAS demonstrates a moderate risk of neurological complication. Nevertheless, considering the critical natural history of severe refractory lesions, this may be considered the first alternative in cases of failed medical therapy. Technical failure, residual stenosis, or in-stent restenosis did not lead to systematic recurrent stroke in this series, which suggests the importance of plaque stabilization and neoendothelialization.