ELEVATED CORONARY VENOUS OXYGEN CONTENT DURING OXYGEN BREATHING IN THE ISCHEMIC MYOCARDIUM UNDER PACING-INDUCED STRESS IN DOGS : Original Articles written in English
スポンサーリンク
概要
- 論文の詳細を見る
The purpose of the present study was to investigate the effect of oxygen inhalation on the stressed (pacing-induced) ischemic myocardium. In 13 open-chest dogs, the left anterior descending coronary artery was partially occluded, the coronary vein accompanying the artery was cannulated for coronary venous blood sampling and a myocardial strain gauge arch was sutured on the myocardium perfused with the partially occluded coronary artery in order to measure the myocardial contractile force. The heart rate was increased by left atrial pacing to increase myocardial oxygen consumption. Respiration was instituted either with oxygen or with room air. Increase of the heart rate caused an increase of blood flow through the partially occluded coronary artery, an increase of the local myocardial oxygen consumption and no consistent change of the local myocardial contractile force both during air breathing and oxygen breathing, provided that the heart rate was less than 200. These values decreased if the heart rate was increased more than 200 both during air and oxygen breathings. Coronary venous oxygen content from the local coronary vein accompanying the partially occluded coronary artery was 2.7 ml per 100 ml on the average during air breathing, while it was elevated to 3.8 ml per 100 ml during oxygen breathing. Although, pacing caused a similar change on coronary blood flow or myocardial contractile force both during air and oxygen breathings, elevated coronary venous oxygen content during oxygen breathing might indicate that ischemic myocardium becomes more aerobic during oxygen breathing. this may be one of the reasons why patient with coronary artery disease can perform more work without complaining chest pain during oxygen breathing.
- 社団法人日本循環器学会の論文
- 1977-04-20
著者
-
Otani Shohei
The First Department Of Medicine Kinki University School Of Medicine
-
Otani Shohei
The First Department Of Internal Medicine Tohoku University School Of Medicine
-
ISHIKAWA KINJI
The 1st Department of Internal Medicine, Kinki University School of Medicine, and the Life Science I
-
OTANI SHOHEI
The 1st Department of Internal Medicine, Kinki University School of Medicine, and the Life Science I
-
KATORI RYO
The 1st Department of Internal Medicine, Kinki University School of Medicine, and the Life Science I
関連論文
- EFFECT OF PACING LOCATION ON CORONARY CIRCULATION AND CARDIAC DYNAMICS
- LEFT VENTRICULAR FUNCTION STUDY DURING ISOMETRIC HANDGRIP : PROCEEDINGS OF THE 38TH ANNUAL MEETING OF THE JAPANESE CIRCULATION SOCIETY
- COUNTERLATERAL CORONARY CIRCULATION AND MYOCARDIAL METABOLISM IN CORONARY ARTERY BRANCH OCCLUSION AND CONSTRICTION DOGS : PROCEEDINGS OF THE 38TH ANNUAL MEETING OF THE JAPANESE CIRCULATION SOCIETY
- REDUCTION OF LEFT VENTRICULAR SIZE FOLLOWING OXYGEN INHALATION IN PATIENTS WITH CORONARY ARTERY DISEASE AS MEASURED BY BIPLANE CORONARY CINEANGIOGRAMS
- INCREASES IN CORONARY VASCULAR RESISTANCE RELATED TO HIGH ARTERIAL OXYGEN TENSION IN DOGS
- COMPARISONS OF LEFT VENTRICULAR ROUNDNESS AND WALL THICKNESS AMONG VARIOUS HEART DISEASES : Angioigraphy : PROCEEDINGS OF THE 44th ANNUAL SCIENTIFIC MEETING OF THE JAPANESE CIRCULATION SOCIETY
- EFFECT OF 40% OR 100% OXYGEN (02) BREATHING ON THE ISCHEMIC MYOCARDIUN IN DOGS : Cardiac Performance : Ist Auditorium : Proceedings of the 43rd Annual Meeting of the Japanese Circulation Society, Tokyo, 1979
- Myocardial Contractile Force and Regional Coronary Perfusion with Hyperoxic Blood : A Paradoxical Effect of 100% Oxygen Inhalation
- -108-REDUCTION IN SEGMENT LENGTH BETWEEN CORONARY ARTERY BY 100% OXYGEN INHALATION IN PATIENTS WITH CORONARY ARTERY DISEASE-MEASUREMENT USING BIPLANE CORONARY CINEANGIOGRAMS : Myocarditis : PROCEEDINGS OF THE 42nd ANNUAL MEETING OF THE JAPANESE CIRCULATIO
- Effect of Hyperoxia on Coronary Vascular Resistance under a Constant Myocardial Oxygen Consumption
- EFFECT OF OXYGEN BREATHING ON THE DIAMETER OF CORONARY ARTERY AND LEFT VENTRICULAR SIZE IN PATIENTS WITH CORONARY ARTERY DISEASE : IInd Auditorium
- NON-INVASIVE MEASUREMENT OF VALVULAR REGURGITATION USING SIMULTANEOUS ECHOCARDIOGRAPHY AND DICHROMATIC EARPIECE DENSITOMETRY : Vth Auditorium : PROCEEDINGS OF THE 40TH ANNUAL MEETING OF THE JAPANESE CIRCULATION SOCIETY
- EFFECT OF REGIONAL MYOCARDIAL HYPEROXIA ON CONTRACTILE FORCE IN DOGS : Vth Auditorium : PROCEEDINGS OF THE 40TH ANNUAL MEETING OF THE JAPANESE CIRCULATION SOCIETY
- Dynamic geometry of the left ventricle studied by biplane cineangiography
- SHORTENING AND RELAXATION CHARACTERISTICS OF THE LEFT VENTRICULAR FREE WALL, INTERVENTRICULAR SEPTUM AND ATRIOVENTRICULAR GROOVE AS MEASURED BY BIPLANE CORONARY CINEANGIOGRAMS : Ventricular function (II) : FREE COMMUNICATIONS (Abstract) : 45 Annual Scient
- LEFT VENTRICULAR PERFORMANCE DURING EARLY DIASTOLE IN PATIENTS WITH AORTIC AND MITRAL REGURGITATION : Ventricular function (II) : FREE COMMUNICATIONS (Abstract) : 45 Annual Scientific Meeting, Japanese Circulation Society
- ELEVATED CORONARY VENOUS OXYGEN CONTENT DURING OXYGEN BREATHING IN THE ISCHEMIC MYOCARDIUM UNDER PACING-INDUCED STRESS IN DOGS : Original Articles written in English
- HIGH CORONARY VENOUS OXYGEN UNDER OXYGEN BREATHING IN THE PACING STRESSED ISCHEMIC MYOCARDIUM IN DOGS : A REASON FOR INCREASED WORK-TOLERANCE?
- -0164-RELATIONSHIP BETWEEN ELECTROCARDIOGRAPHIC ST-SEGMENT RE-ELEVATION IN SUBACUTE PHASE AND LEFT VENTRICULAR ASYNERGY IN MYOCARDIAL INFARCTION