title: [Intramyocardial pressure at various depths, during aortic constriction and myocardial ischemia in the dog (author's transl)].
abstract: Systolic intramyocardial pressure (IMP) is measured with a modification of the "closed perfusion technic" in 3 different layers of the myocardium in 8 anesthetized mongrel dogs. In the subendocardium IMP exceed left ventricular pressure (LVP) by about 30% whereas it is 30% lower than LVP in the subepicardium. Under resting conditions the level of isobaric balance of IMP and LVP is at a distance of 57% from the epicardium. During thoracic aortic constriction the ratio of IMP/LVP increases in the subepicardium but decreases in the subendocardium. Occlusion of the left circumflex coronary artery for 30 seconds results in a decrease of IMP and IMP/LVP in the ischemic region. In 25% of all cases, however, an increase of these parameters is found.
mesh_terms: D000818:Animals; D001024:Aortic Valve Stenosis / Q000503:physiopathology*; D001794:Blood Pressure; D003326:Coronary Circulation; D003327:Coronary Disease / Q000503:physiopathology*; D003331:Coronary Vessels / Q000502:physiology; D004285:Dogs; D006321:Heart / Q000503:physiopathology; D010477:Perfusion
vernacular_title: Der intramyokardiale Druck des Hundes in verschiedenen Tiefen, bei Druckbelastung und bei Ischämie des Herzmuskels