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3. Haemodynamic effect of atrial triggered versus fixed rate pacing at rest and during exercise in complete heart block;Karlof, I.;Acta Med Scand,1975
4. Respiration dependent ventricular pacing compared with fixed ventricular and A-V synchronous pacing: aerobic and haemodynamic variables;Rossi, P.; Rognoni, G.; Occhetta, E.;J Am Coll Cardiol,1985
5. Increase in cardiac output with rate responsive pacemakers;Beyersdorf, F.; Kreuzer, J.; Happ, J.; Zegelman, M.; Satter, P.;Ann Thorac Surg,1986