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Optimized Management of Endovascular Treatment for Acute Ischemic Stroke
Published on: January 18, 2018
The capillary index score: rethinking the acute ischemic stroke treatment algorithm. Results from the Borgess Medical
Firas Al-Ali1, Anne Jefferson, Tom Barrow
1Neurointerventional Surgery and Diagnostic Services, Borgess Medical Center, Kalamazoo, Michigan 49048, USA. firasalali@aol.com
Insights
The capillary index score (CIS) can improve patient selection for acute ischemic stroke treatment. A favorable CIS, along with successful recanalization, predicts better clinical outcomes, potentially breaking the 50% outcome barrier.
Area of Science:
- Neurology
- Interventional Neuroradiology
- Stroke Medicine
Background:
- Acute ischemic stroke treatment has improved recanalization rates, but good clinical outcomes remain below 50%.
- Enhanced patient selection criteria are needed to improve treatment efficacy.
- The capillary index score (CIS) is a novel index assessing viable tissue in ischemic areas.
Purpose of the Study:
- To investigate the utility of the capillary index score (CIS) as an adjunct to existing criteria for selecting patients for acute ischemic stroke treatment.
- To determine if CIS can help improve the rate of good clinical outcomes in treated patients.
Main Methods:
- A non-randomized, single-center registry of patients undergoing intra-arterial treatment for acute ischemic stroke.
- CIS was calculated from pre-intervention cerebral angiograms in patients with internal carotid artery (ICA) or middle cerebral artery (MCA) occlusion.
- Good outcome was defined as a modified Rankin Scale (mRS) score of 0-2 at 3 months; successful recanalization was TIMI 2 or 3.
Main Results:
- Of 46 patients with ICA or MCA (M1) occlusion, 72% achieved successful recanalization, and 27% had a good outcome.
- A favorable CIS (2 or 3) was present in 42% of patients; good outcomes occurred exclusively in this group (p=0.0148).
- Successful recanalization (p=0.0029) and shorter time to revascularization (p=0.0039) predicted good outcomes. Patients with favorable CIS and TIMI 3 recanalization had an 83% good outcome rate.
Conclusions:
- Favorable capillary index score (CIS) and successful recanalization are strong predictors of good clinical outcomes in acute ischemic stroke.
- Incorporating CIS into patient selection criteria may enhance treatment effectiveness and help surpass the 50% good outcome threshold.
Background:
Despite increased recanalization rates in the treatment of acute ischemic stroke, the percentage of patients with a good clinical outcome of all those treated has not risen above 50%. This 50% barrier may be broken by improving the criteria for treatment selection. This study investigated the addition of the capillary index score (CIS), a new index for assessing remaining viable tissue in the ischemic area, to the existing criteria.
Methods:
The Borgess Medical Center Ischemic Stroke Registry is a non-randomized single-center single-operator registry of consecutive subjects admitted for intra-arterial treatment of acute ischemic stroke. The CIS was calculated from a pre-intervention catheter cerebral angiogram in subjects with internal carotid artery (ICA) or middle cerebral artery (MCA) (M1) occlusion. Thrombolysis In Myocardial Infarction (TIMI) 2 or 3 was considered successful recanalization. A modified Rankin Scale (mRS) of 0-2 at 3 months was considered a good outcome.
Results:
ICA or MCA (M1) occlusion was found in 46 of 58 consecutive patients treated by the same operator. Recanalization was successful in 72% of patients and 27% had a good outcome. CIS was available for 26 patients; 42% were favorable (2 or 3) and 58% were poor (0 or 1). A good outcome was found only in the favorable CIS group (p=0.0148). Successful recanalization (p=0.0029) and time from ictus to revascularization (p=0.0039) predicted a good outcome. Of patients with favorable CIS and TIMI 3, 83% had a good outcome.
Conclusions:
Favorable CIS and recanalization were strong predictors of a good outcome. By using this new index as an adjunct to other criteria, the CIS may improve patient selection and help break the 50% barrier.
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