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There is an on-going discussion weather remote ischemic conditioning (RIC) is effective in limiting the damage of reperfusion injury in STEMI patients. The results from recent RCTs have been variable and most have not shown convincing positive results when analyzing hard endpoints. Hence, there is a great need to evaluate the impact of comorbidities on the effectiveness of RIC. Therefore, we have designed a study to evaluate the impact of hypercholesterolemia on the RIC response by evaluating ischemia-induced endothelial dysfunction.
Aim: To investigate the impact of hypercholesterolemia on the RIC response in counteracting ischemia-induced endothelial dysfunction.
Study population:
We plan to include 12 poorly controlled/newly diagnosed subjects with familiar hypercholesterolemia (FH) and 12 age-matched control subjects.
Inclusion criteria (FH subjects)
Exclusion criteria
Main exposure:
Remote ischemic conditioning, i.e. 4 cycles of 5 minutes of ischemia to the lower limb.
Comparision group:
Cross over design, patients preform the protocol twice, once with sham and once with RIC. Also a group of healthy matched controls will be recruited.
Outcome:
Change in FMD after 20 minutes of ischemia and 20 minutes of reperfusion with the exposure of either sham or RIC.
Design:
Randomized interventional cross-over.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Ischemia reperfusion +remote ischemic conditioning | Active Comparator | Active administration of short cykcles of ischemia. |
|
| Ischemia reperfusion +sham | Sham Comparator | Placebo experiment without remote ischemic conditioning. |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Remote ischemic conditioning | Procedure | Brief cycles of ischemia to a limb. A blood pressure cuff was placed around the right thigh and inflated to 200 mmHg for 4 cycles of 5 minutes. |
| Measure | Description | Time Frame |
|---|---|---|
| Flow-mediated vasodilatation/endothelium-dependent vasodilatation | A ultrasound based technic for evaluation of endothelial function | 20 min post-reperfusion |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Affiliation | Role |
|---|---|---|
| John Pernow, Prof | Karolinska Institutet | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Karolinska Institutet, Karolinska University Hospital | Stockholm | 17176 | Sweden |
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| ID | Term |
|---|---|
| D006937 | Hypercholesterolemia |
| ID | Term |
|---|---|
| D006949 | Hyperlipidemias |
| D050171 | Dyslipidemias |
| D052439 | Lipid Metabolism Disorders |
| D008659 | Metabolic Diseases |
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| D009750 |
| Nutritional and Metabolic Diseases |