Phase 1, single-center, open-label clinical study to assess the safety and efficacy of topical nitroglycerin on dilation of the radial artery. Subjects will receive nitroglycerin ointment prior to scheduled PCI and radial artery measurements will be performed to determine mean increase in radial artery diameter at several time points. There will be 20 subjects enrolled in this study.
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Change in systolic blood pressure
Timeframe: 45 minutes
Incidence of headache
Timeframe: 45 minutes
Hematoma
Timeframe: 45 minutes