1. Atrial synchronized pacing using a new transvenous technique;Vogel;Ann. Cardiol. Angeiol.,1971
2. A new transvenous electrode with myocardial fixation for permanent pacing;Bleifeld,1971
3. Permanent pervenous atrial pacing from the coronary vein;Kramer;Circulation,1970
4. Atrial-triggered pacemaking without thoracotomy: Apparatus and results in twenty cases;Lagergren;Acta Chir. Scand.,1966
5. Permanent transvenous synchronous cardiac pacing;Smyth;Ann. Thorac. Surg.,1971