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Study aim
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In this study, the efficacy of combined topical gel of verapamil, nitroglycerin and lidocaine will be investigated in preventing radial artery spasm during angioplasty via radial artery.
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Design
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Randomized, two-blinded, parallel, placebo-controlled clinical trial with 64 patients in each group.
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Settings and conduct
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This two blind study will be done in Tehran Heart Center. Health care providers and patients are blind. Patients fall into two groups using block randomization. One group received placebo gel and other received therapeutic gel. The basal diameter of radial artery is measured with ultrasound. 0.5 to 1 hour before process, the therapeutic or the placebo gel are applied on the radial artery pulse, and then covered with a transparent dressing. After removing the gel, the radial artery diameter is measured with ultrasound before process beginning. During PCI, following parameters is recorded: Sedative drug and its dose, Sheath insertion in one or more attempts, Wire passage in one or more attempts, Vasodilator parenteral cocktail used, Sympathetic system response, Radial artery spasm score, Patient forearm pain. After performing PCI, radial artery is reevaluated with ultrasound.
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Participants/Inclusion and exclusion criteria
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Inclusion criteria:
Age older than 18 years old
Radial elective PCI candidates
Exclusion criteria:
Hypersensitivity or contraindication to lidocaine
Hypersensitivity or contraindication to nitroglycerin
Baseline weak radial pulse
Inadequate blood supply to palm
Presence of artriovenous fistula for dialysis
Pregnant women or nursing mothers
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Intervention groups
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Intervention group: Combined Topical Gel of Verapamil, Nitroglycerin and Lidocain will be applied before PCI. Control group: Placebo gel will be applied before PCI.
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Main outcome variables
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Radial artery spasm؛ Change in Radial artery diameter