Objectives The aim of the study was too observe the correlative factors of radial artery spasm (RAS), compare the effect of different spasmolytic regimens on RAS by radial artery angiography.
Methods One hundred and eighty patients (97 males and 83 females) undergoing transradial coronary angiographyor intervention at our center were divided into three groups: nitroglycerin group (60 patients), nicardipine group (60 patients) and cocktail group (60 patients) randomly. The radial arteriography was performed throughthe sheath at baseline. Then nitroglycerin 200 µg, nicardipine 200 µg and 100 µg of nicardipine plus 100 µg of nitroglycerin were injected respectively through the right radial arteries. Radial arteriograms were taken 1 min and 2 min after injection of vasodilators. The RAS incidence was compared at baseline, 1 min and 2 min after injection of vasodilators by one-way ANOVA in three groups. Stenosis of radial arteries in diameter was measured by quantitative computed analysis (QCA) method on radial arteriograms, RAS was defined asstenosis >70%, and clinical RAS was defined as patients' feeling of pain or there was obvious resistance in advancing or withdrawing catheters.
Results The total RAS rate was 10.6%, and clinical RAS rate 6.2%.Diameter of radial artery, sheath profile and previousTRI history >2 were RAS independent risk factors. The RAS rate at baseline innitroglycerin group, nicardipine group and cocktail group was 15%, 8.3% and 8.3% (no significant difference), 3.3%, 5.0% and 1.7% (no significant difference) at 1 min after injection of vasodilators, 1.7% (vs Nicardipine group, p<0.05), 3.3% and 0%. (vs other two groups, both p<0.05) at 2 min after injection.
Conclusions RAS rate was 10.6%.The independent relative factors of RAS included diameter of radial artery, sheath profile and ≥2 previous TRI history. Nitroglycerin and Nicardipinecan significantly dilate radial arteries, but the combination of both has a more powerful effect.