Origin of great cardiac vein and coronary sinus drainage within the left ventricle.

摘要: The relative contributions of left anterior descending (LAD) and circumflex (LC) arterial inflow to blood sampled at various points within the great cardiac vein (GCV) coronary sinus (CS) have been investigated in open-chest dogs. Dissolved helium (He) hydrogen (H2) were infused into external circuits perfusing LAD LC, respectively, their steady-state concentrations measured chromatographically GCV CS. Under basal conditions H2 averaged only 5% mid-CS did not change greatly during alterations preload afterload or selective LC obstruction vasodilation. relationship He GCV. was more variable under changed noticeably changes inflow. Appreciable amounts present consistently marginal drainage. We conclude that: 1) is remarkably free both normal abnormal physiological states; 2) origin variable, from animal individual animals before after interventions; 3) a portion drainage normally reaches CS through venous branches rather than