[Myocardial perfusion in myocardiopathies: study at rest and during induced tachycardia].
The authors have compared myocardial perfusion, i.e. the coronary blood flow per unit of myocardial mass, in 9 patients with cardiomyopathy and 5 normal subjects, both at rest and during coronary sinus pacing-induced tachycardia at a rate of 150 beats/mn. In the cardiomyopathies, myocardial perfusion was found to be decreased at rest, and to remain abnormally low during induced tachycardia despite the evidence for a significant coronary reserve. During pacing there were, in addition to induced chest pain, indirect signs of sub-endocardial ischaemia which could explain the angina of effort found in certain cardiomyopathies, especially those of the obstructive hypertrophic type.
D002304:Cardiac Pacing, Artificial; D009202:Cardiomyopathies / Q000175:diagnosis / Q000503:physiopathology*; D003326:Coronary Circulation; D006333:Heart Failure / Q000503:physiopathology; D006339:Heart Rate; D006801:Humans; D007511:Ischemia; D007773:Lactates / Q000378:metabolism; D009206:Myocardium / Q000378:metabolism; D010101:Oxygen Consumption; D012146:Rest; D013610:Tachycardia / Q000503:physiopathology
D007773:Lactates
La perfusion myocardique dans les cardiomyopathies. Etude au repos et lors de tachycardie induite.