Left ventricular pressure-mural force relationship during sympathetic stimulation.
Influence of sympathetic stimulation on the relation of ventricular pressure--directly recorded wall tension were investigated in the left ventricle of the opened chested dogs. It was shown, that despite the substantial decrease of the end-diastolic pressure, sympathetic stimulation did not result in decrease in the wall tension per unit pressure. Investigation of the diastolic circumferential segment length-diastolic pressure relation revealed, that diastolic compliance was increased under the sympathetic stimulation. The revelance of these findings to the regulation of the ventricular performance is discussed.
D000818:Animals; D006328:Cardiac Catheterization / Q000295:instrumentation; D002395:Catecholamines / Q000494:pharmacology*; D004285:Dogs; D004837:Epinephrine / Q000494:pharmacology; D006352:Heart Ventricles / Q000187:drug effects; D009200:Myocardial Contraction / Q000187:drug effects*; D009638:Norepinephrine / Q000494:pharmacology; D011312:Pressure; D013268:Stimulation, Chemical; D013564:Sympathetic Nervous System / Q000187:drug effects* / Q000502:physiology; D014159:Transducers; D016276:Ventricular Function
D002395:Catecholamines; D009638:Norepinephrine; D004837:Epinephrine