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- W2023384184 abstract "The effects of experimentally induced atrial and ventricular tachycardias on the cardiovascular dynamics were studied in anesthetized dogs. It was found that atrial and ventricular tachycardias decrease mean systemic arterial pressure, cardiac output, and depress ventricular function curves. Moreover, the tachycardias increase myocardial contractile force, pulmonary arterial pressure, left and right atrial pressures, and total peripheral resistances. The magnitude of these hemodynamic changes observed in atrial or ventricular tachycardia of the same focus increases in proportion to increases in heart rate (from 180 to 280 beats/min). Furthermore, the magnitude of the hemodynamic changes observed in ventricular tachycardia of a given rate is much greater than that observed in atrial tachycardia of an equivalent rate. Coupling with these observations, studies on the pressure pulses of the left ventricle, aorta and left atrium reveal the impairment of ventricular filling in both atrial and ventricular tachycardias, and the abnormality in the mode of ventricular contraction and the occurrence of mitral and tricuspid regurgitations in ventricular tachycardia. The mechanisms responsible for the hemodynamic changes observed in tachycardia are discussed." @default.
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- W2023384184 date "1966-01-01" @default.
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- W2023384184 title "Hemodynamic Effects of Experimentally Induced Atrial and Ventricular Tachycardia" @default.
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- W2023384184 doi "https://doi.org/10.3109/13813456609059890" @default.
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