[Effect of tachycardia on hemodynamics and coronary circulation. Different relevance of ventricular tachycardias for healthy persons, coronary patients and patients with left heart hypertrophy].
Investigations on the haemodynamics, coronary flow and metabolism of tachycardias were carried out in 195 patients during routine diagnostic examinations (left ventricular catheterization; intracardiac electro-physiological studies) from 1974 to 1980. The following measurement methods were used: 1. controlled cardiac electrostimulation to simulate paroxysmal tachycardias (atrial, atrioventricular-sequential and ventricular stimulation); 2. intracardiac pressure; 3. cincecardiographic parameters; 4. coronary flow; 5. coronary reserve (dipyridamol vasodilation); 6. cardiac output; 7. myocardial ischaemia; 8. myocardial oxygen consumption. The results are presented as follows: I. Adaptive alterations of arterial pressure and coronary flow with an abrupt start and stop of a tachycardia paroxysm; II. Arterial pressure in the steady state of a tachycardia, metabolic effects, evidence of ischaemia and coronary reserve; III. Effects of a tachycardia on the determinant parameters of the aortic valve function in aortic stenosis before and after aortic valve replacement; IV. Definition of the atrial pump support of the left ventricle during tachycardia.
D001021:Aortic Valve / Q000503:physiopathology; D001024:Aortic Valve Stenosis / Q000503:physiopathology; D002304:Cardiac Pacing, Artificial; D006332:Cardiomegaly / Q000503:physiopathology*; D003326:Coronary Circulation / Q000187:drug effects; D003327:Coronary Disease / Q000503:physiopathology*; D004176:Dipyridamole; D006325:Heart Atria / Q000503:physiopathology; D006352:Heart Ventricles / Q000503:physiopathology; D006439:Hemodynamics / Q000187:drug effects; D006706:Homeostasis / Q000187:drug effects; D006801:Humans; D009206:Myocardium / Q000378:metabolism; D010100:Oxygen / Q000097:blood; D013610:Tachycardia / Q000503:physiopathology*
D004176:Dipyridamole; D010100:Oxygen
Einfluss der Tachykardie auf Hämodynamik und Koronarfluss. Unterschiedliche Relevanz ventrikulärer Tachykardien für Gesunde, Koronarkranke und Patienten mit Linksherz-Hypertrophie.