[Sequential pacing following cardiopulmonary bypass].
Twenty patients with combined mitral valve disease were studied to evaluate whether the mode of cardiac pacing can influence myocardial performance after cardiopulmonary bypass. All patients underwent the same surgical procedure (mitral-valve-replacement) under standardized anaesthetic procedure. After weaning from extracorporeal circulation the following haemodynamic measurements were performed either under ventricular pacing or under sequential ("physiological") pacing: blood-pressure (radial artery), central venous pressure (CVP, jugular vein), cardiac output (as cardiac index, C. I.), pulmonary artery pressure (PAP) using Swan-Ganz-thermodilution catheter (jugular vein) and left atrial pressure (LAP). All patients were investigated as well under ventricular pacing as under sequential pacing (heart rate: 90 X min-1; AV-delay: 200 msec; stimulation with a pacemaker Medtronics 5330). Compared with the situation under ventricular pacing the haemodynamic parameters changed, when sequential pacing was applied: arterial pressure and cardiac output increased, whereas CVP as well as PAP and LAP decreased. The data indicate that there is some influence on cardiac work by the mode of pacing. Physiological pacing compared to ventricular pacing seems to lead to a marked improvement in cardiac performance. Particularly patients with severe dysrhythmia following cardiopulmonary bypass should be treated by physiological (sequential) pacing.
D001794:Blood Pressure; D002302:Cardiac Output; D002304:Cardiac Pacing, Artificial; D002315:Cardiopulmonary Bypass; D002496:Central Venous Pressure; D003326:Coronary Circulation; D005260:Female; D006439:Hemodynamics; D006801:Humans; D008297:Male; D008875:Middle Aged; D011182:Postoperative Care
Sequentielles Pacing nach kardiopulmonalem Bypass (CPB).