- Clinical competence in ambulatory electrocardiography. A statement for physicians from the AHA/ACC/ACP Task Force on Clinical Privileges in Cardiology. Knoebel, S.B., Williams, S.V., Achord, J.L., Reynolds, W.A., Fisch, C., Friesinger, G.C., Klocke, F.J., Akhtar, M., Ryan, T.J., Schlant, R.C. Circulation (1993)