Korean Vascular Intervention Society Multicenter Registry Study on Outcomes of Endovascular Therapy in Lower Limb Artery Diseases: (A Retrospective & Prospective Observational Study)

Study Overview
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Brief Summary
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Study design: multicenter retrospective and prospective observational study Study Cohort : Retrospective cohort: This cohort retrospectively enrolls patients with lower extremity artery disease who underwent endovascular treatment from January 2006 to the date of approval by IRB in the participating hospitals. Informed consent was waived by IRB. Prospective cohort: This cohort prospectively enrolls patients with lower extremity artery disease who undergo endovascular treatment from the date of approval by IRB to July, 2018 in the participating hospitals. Informed consent will be obtained prior to enrollment. Baseline clinical and lesion characteristics, procedural and post-procedural data, clinical outcomes, hemodynamic, and imaging follow-up data are investigated. Primary patency and target lesion revascularization rates of the total cohort and patient subgroups are evaluated. Risk factors of restenosis and target lesion revascularization are determined.

Detailed Description
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This is an observational study. The study includes patients who underwent endovascular treatments for lower extremity artery diseases and investigates immediate and late outcomes of the treatments. The investigator does not assign any specific interventions.

Conditions
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Peripheral Arterial Disease(PAD)

Intervention / Treatment
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* Procedure: endovascular treatment


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Retrospective data Age 20 years of older Patients in the treatment or trying about symptomatic peripheral artery disease from January 2006 until IRB approval date Prospective data Age 20 years of older Patients in the treatment or trying about symptomatic peripheral artery disease from IRB approval date Symptomatic peripheral artery disease: Moderate or severe claudication (Rutherford category 1 to 3) Critical limb ischemia (Rutherford category 4 to 6) Exclusion Criteria: Pregnant women or women with potential childbearing Moderate Alzheimer's disease, mental illness or neurological disease of more than those who can not understand the purpose of this clinical trials and Methods Life expectancy <1 year due to comorbidity

Ages Eligible for Study
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Minimum Age: 20 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Retrospective cohort<br>This cohort retrospectively enrolls patients with lower extremity artery disease who underwent endovascular treatment from January 2006 to the date of approval by IRB in the participating hospitals. | Procedure: endovascular treatment<br>* endovascular treatment<br>|
| Prospective cohort<br>This cohort prospectively enrolls patients with lower extremity artery disease who undergo endovascular treatment from the date of approval by IRB to July, 2018 in the participating hospitals. | Procedure: endovascular treatment<br>* endovascular treatment<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Primary patency | Primary patency is defined as freedom from more than 50% restenosis based on CT angiography, duplex ultrasound or catheter-based angiography or from clinically-driven target lesion revascularization. | 12 months | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Target lesion revascularization (TLR) | Any re-intervention within the target lesion due to symptom aggravation or drop of ankle brachial index (ABI) >0.15 when compared to post procedure baseline. | 12 months |