Simultaneous measurement of coronary sinus oxygen saturation and blood flow during terminal warm blood cardioplegia in coronary artery bypass grafting. 1998

T Yasuda, and S Sawa, and N Ishikawa, and N Tanaka
Department of Thoracic and Cardiovascular Surgery, Yokohama Sakae Kyosai Hospital, Yokohama.

Simultaneous measurement of coronary venous oxygen saturation and coronary venous blood flow is an essential method that reveals myocardial oxygen metabolism. But there have been no reports of the simultaneous measurements during warm blood cardioplegic infusion in cardiac surgery. Thirteen patients underwent elective coronary artery bypass grafting in our unit. Simultaneous measurement of coronary venous oxygen saturation (ScsO2) and coronary venous blood flow (Fcs) was carried out during terminal warm blood cardioplegia. Fcs increased rapidly and reached plateau level (178 +/- 18 ml/min) between 0 and 1 min after blood cardioplegic infusion. But ScsO2 increased slowly and reached a peak level (84 +/- 3%) between 1 and 2 min after blood cardioplegic infusion, and then dropped gradually. Using the Fick formula, myocardial oxygen consumption at 5 min after blood cardioplegic infusion was 3.7 ml/min/heart. Simultaneous continuous measurements of ScsO2 and Fcs were useful monitors of the myocardial distribution of the blood cardioplegic solution, and cleared the myocardial oxygen metabolism during terminal warm blood cardioplegia.

UI MeSH Term Description Entries
D009206 Myocardium The muscle tissue of the HEART. It is composed of striated, involuntary muscle cells (MYOCYTES, CARDIAC) connected to form the contractile pump to generate blood flow. Muscle, Cardiac,Muscle, Heart,Cardiac Muscle,Myocardia,Cardiac Muscles,Heart Muscle,Heart Muscles,Muscles, Cardiac,Muscles, Heart
D010100 Oxygen An element with atomic symbol O, atomic number 8, and atomic weight [15.99903; 15.99977]. It is the most abundant element on earth and essential for respiration. Dioxygen,Oxygen-16,Oxygen 16
D010101 Oxygen Consumption The rate at which oxygen is used by a tissue; microliters of oxygen STPD used per milligram of tissue per hour; the rate at which oxygen enters the blood from alveolar gas, equal in the steady state to the consumption of oxygen by tissue metabolism throughout the body. (Stedman, 25th ed, p346) Consumption, Oxygen,Consumptions, Oxygen,Oxygen Consumptions
D001783 Blood Flow Velocity A value equal to the total volume flow divided by the cross-sectional area of the vascular bed. Blood Flow Velocities,Flow Velocities, Blood,Flow Velocity, Blood,Velocities, Blood Flow,Velocity, Blood Flow
D001784 Blood Gas Analysis Measurement of oxygen and carbon dioxide in the blood. Analysis, Blood Gas,Analyses, Blood Gas,Blood Gas Analyses,Gas Analyses, Blood,Gas Analysis, Blood
D001831 Body Temperature The measure of the level of heat of a human or animal. Organ Temperature,Body Temperatures,Organ Temperatures,Temperature, Body,Temperature, Organ,Temperatures, Body,Temperatures, Organ
D003326 Coronary Circulation The circulation of blood through the CORONARY VESSELS of the HEART. Circulation, Coronary
D003331 Coronary Vessels The veins and arteries of the HEART. Coronary Arteries,Sinus Node Artery,Coronary Veins,Arteries, Coronary,Arteries, Sinus Node,Artery, Coronary,Artery, Sinus Node,Coronary Artery,Coronary Vein,Coronary Vessel,Sinus Node Arteries,Vein, Coronary,Veins, Coronary,Vessel, Coronary,Vessels, Coronary
D006324 Heart Arrest, Induced A procedure to stop the contraction of MYOCARDIUM during HEART SURGERY. It is usually achieved with the use of chemicals (CARDIOPLEGIC SOLUTIONS) or cold temperature (such as chilled perfusate). Cardiac Arrest, Induced,Cardioplegia,Induced Cardiac Arrest,Induced Heart Arrest,Cardioplegias
D006454 Hemoglobins The oxygen-carrying proteins of ERYTHROCYTES. They are found in all vertebrates and some invertebrates. The number of globin subunits in the hemoglobin quaternary structure differs between species. Structures range from monomeric to a variety of multimeric arrangements. Eryhem,Ferrous Hemoglobin,Hemoglobin,Hemoglobin, Ferrous

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