Clinical Trials Logo
  1. Home
  2. Critical Limb Ischemia
  3. NCT02091921

Switch to Ticagrelor in Critical Limb Ischemia Anti-platelet Study — STT-CLIPS  

Critical Limb Ischemia Clinical Trial

Official title:
Switch to Ticagrelor in Critical Limb Ischemia Anti-platelet Study

Clinical Trial Summary

Critical Limb Ischemia (CLI) is defined as limb pain that occurs at rest, or impending limb loss that is caused by severe compromise of blood flow to the affected extremity. CLI is a major cause of death and disability (secondary to myocardial infarction, stroke and amputation). The mortality in patients with CLI approaches 13-25% and 50% at one and five years respectively. High on-treatment platelet reactivity (HPR) in patients treated with aspirin and clopidogrel is associated with increased risk of recurrent cardiovascular events after percutaneous coronary interventions and coronary syndromes. Preliminary studies suggest that the prevalence of HPR in patients with critical limb ischemia treated with aspirin and clopidogrel is as high a 78.5%. In patients with coronary artery disease ticagrelor overcomes non-responsiveness to clopidogrel. However, the antiplatelet effect of ticagrelor in patients with critical limb ischemia is unknown.

Clinical Trial Description

Study Aim: This pilot study aims to investigate platelet function after switching from clopidogrel to ticagrelor in patients with critical limb ischemia.

Fifty patients with diagnosis of CLI (Rutherford class IV-VI) treated with clopidogrel 75 mg and aspirin 81 mg daily will be tested for inhibition of platelet aggregation using the VerifyNow P2Y12 and VASP assays before and 6±1 hours after their daily clopidogrel dose. All patients will then be switched from clopidogrel to ticagrelor 90 mg twice daily for two weeks and the VerifyNow and Vasodilator-Stimulated Phosphoprotein (VASP) platelet reactivity assays repeated, samples will be collected before and 6±1 hours after the last ticagrelor dose. For exploratory analysis, patients will be divided in two groups based on the P2Y12 reaction units (PRU): Group 1. High on treatment platelet reactivity on clopidogrel (HPR), defined as P2Y12 reaction units (PRU) ≥208 and Group 2. Appropriate platelet inhibition on clopidogrel (API), defined as P2Y12 reaction units (PRU) <208. If subjects are withdrawn from the study prior to completion due to the high co-morbidity rate of this population, additional subjects will be enrolled to reach a total of 50 completed subjects for data analysis. ;

Study Design

Related Conditions & MeSH terms

Clinical Trial Details
NCT number NCT02091921
Study type Interventional
Source University of Southern California
Contact
Status Completed
Phase Phase 1/Phase 2
Start date February 16, 2014
Completion date November 30, 2016
View Details
See also
  Status Clinical Trial Phase
Active, not recruiting NCT03987061 - MOTIV Bioresorbable Scaffold in BTK Artery Disease N/A
Recruiting NCT03668353 - Recombinant SeV-hFGF2/dF Injection for PAOD Phase 1
Recruiting NCT04110964 - Evaluation of Safety and Tolerability of Libella Gene Therapy for Critical Limb Ischemia: AAV- hTERT Phase 1
Not yet recruiting NCT03994666 - Cell Therapy in Critical Limb Ischemia Phase 2
Recruiting NCT02389023 - Comparison of Prevena Negative Pressure Incision Management System vs. Standard Dressing After Vascular Surgery N/A
Not yet recruiting NCT02498080 - Drug Eluting Balloons PTA in Infra-popliteal Arteries in Patients With Critical Limb Ischemia N/A
Completed NCT02539940 - Elutax-SV Drug-eluting Balloons for Below-the-knee Treatment
Recruiting NCT02239419 - Evaluation of Carbothera in the Treatment of Foot Ulcers N/A
Recruiting NCT01938872 - Evaluating the Effectiveness of Paclitaxel-eluting Balloons for Below-the-knee Angioplasty in Patients With Critical Limb Ischemia N/A
Active, not recruiting NCT01211925 - Distal Venous Arterialisation of Ischemic Limb Phase 2/Phase 3
Completed NCT02454231 - Monocentric Trial: Stem Cell Emergency Life Threatening Limbs Arteriopathy (SCELTA) Phase 2/Phase 3
Completed NCT01758874 - Study to Explore the Effect of Lowering Blood Viscosity in Patients With Treatment-resistant Critical Limb Ischemia Phase 2
Completed NCT02475200 - Phoenix Post-Approval Registry - Using the Phoenix Atherectomy Systems
Recruiting NCT04583436 - Efficacy and Safety Comparison of the Open and Endovascular Surgical Methods for the Treatment of Long Atherosclerotic Lesions of the Femoral-popliteal Segment Below the Knee, TASC D in Patients With Critical Limb Ischemia N/A
Completed NCT04071782 - Investigating the Safety and Efficacy of the Treatment With the Selution Sirolimus Coated Balloon in TASC C and D Tibial Occlusive Disease in Patients With Critical Limb Ischemia From Singapore N/A
Completed NCT03669458 - Feasibility Clinical Trial Using the SPUR System to Demonstrate Safety and Efficacy. N/A
Not yet recruiting NCT06007469 - Pedal Acceleration Time (PAT) as a Measure of Foot Perfusion
Recruiting NCT04110327 - An All-Comers Observational Study of the MicroStentâ„¢ Peripheral Vascular Stent System in Subjects With Peripheral Arterial Disease
Completed NCT02260622 - Pilot Study to Examine the Use of Rivaroxaban After Angioplasty for Critical Limb Ischemia Phase 2
Recruiting NCT02054416 - External Compression Therapy for Secondary Prevention of Lower-Limb Loss and Cardiovascular Mortality N/A