This study was undertaken to examine the impact of the variations of cardiac mechanical work in heart’s respiratory quotient (RQ) and venoarterial carbon dioxide difference (ΔPCO2). In twenty-seven patients undergoing coronary artery bypass grafting under extracorporeal circulation, a coronary sinus line was instituted and it’s correct position was verified by the waveform displayed in the monitor. Immediately after cannulae placement, a haemodynamic profile was obtained and simultaneous arterial and coronary sinus (a & cs) sampling for blood gas analysis was done in an ABL 720 (Radiometer Copenhagen) analyzer.
Continue reading