HAeMODYNAMIC STUDIES DURING AURICULAR FIBRILLATION AND AFTER RESTORATION OF SINUS RHYTHM

A Correlation of Clinical and Hemodynamic Studies in Patients With Hyperthyroidism With and Without Congestive Heart Failure *

“…The persistence of the arrhythmia in these two patients for over two years after they had become euthyroid and its eventual subsequent disappearance in one (S. S.) suggests, however, a disorder of a more chronic nature. Althought atrial fibrillation does not compromise the circulation at rest, impaired circulatory responses to the increased circulatory demands of exercise are well-documented (46)(47). Since the circulation of the hyperthyroid patient is under a constantly increased load even at rest, the probable importance of this arrhythmia as a factor in the development of congestive failure is evident (48)(49).…”

The peri‐operative management of atrial fibrillation

“…The optimum ventricular rate at rest has been shown to be 90 beats.min À1 , with faster rates being appropriate during exercise [29]. Haemodynamic studies have demonstrated decreased right and left atrial pressures, increased cardiac output at rest and during exercise and an increased capacity for exercise following successful cardioversion [24,[30][31][32][33][34]. Although atrial electrical activity returns immediately after successful cardioversion, the improvement in atrial mechanical function is variable and usually increases over the subsequent 24 h [35,36].…”

Cardiovascular responses to transvenous electrical cardioversion of atrial fibrillation in anaesthetized horses

“…Although CI and/or SI also increased after conversion to sinus rhythm in humans with AF and underlying cardiac disease (Reeve Hansen et al. 1952; Broch & Müller 1957; Reale 1965; Killip & Baer 1966), the increase was not significant in patients with AF alone (Killip & Baer 1966).…”