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[Correspondence] Radial versus femoral access for cardiac catheterisation

In the MATRIX study,1 the reported rate of major adverse cardiovascular events (MACEs) using femoral access was significantly higher than that in other randomised trials (table). This observation could be explained by a sicker patient base than in other studies, but the MATRIX Investigators asserted a pronounced benefit of radial access in high radial volume centres. In that scenario, we would expect the incidence of MACEs to be similar between high radial volume centres and other centres when using femoral access but much lower when using radial access.