Myocardial oxygen metabolism of the right ventricle with volume loading and hypoperfusion.

摘要: A comparison of blood flow and myocardial O2 consumption (MV^.O2) in the right left ventricles was made dogs whose chests had been opened. The effect volume loading by arterio-venous arterio-left atrial shunts, ventricular hypoperfusion rapid removal were examined presence absence pericardium. Blood per unit myocardium greater anterior descending coronary artery (LAD) than (RCA), 75±4.3 vs. 46±2.8 (mean±SE)ml/min 100g, respectively. Similarly, extraction ratio (EO2) 59±2% ventricle 43±3% (p<0.001). MV^.O2 for ventricle, 8.0±0.6 3.5±0.3 ml O2/min 100g. loadiing to both (AV) shunt increased augmented EO2 addition a rise arterial flow. Decrease aortic pressure ventricles. increments 54 31% (p<0.01). When pericardium closed with suture, end-diastolic rose, but did not change. We conclude that reserve capacity ventricle.