Effect of carotid and aortic baroreceptors on cardiopulmonary reflex: the role of autonomic function

Heart rate variability during hemodialysis in patients with chronic renal disease

“…In this context, the LF index of HRV is also considered an indicator of baroreflex function [12,20]. It was previously observed that during hemodialysis hypotensive events were associated with significant increases in LF and HF frequency domain indices and also in baroreflex function [11].…”

“…This result demonstrates that the parasympathetic modulation of the heart increased during hemodialysis. The concept of paradoxical withdrawal of sympathetic reflex vasoconstriction with bradycardias as one of the most important mechanisms of cardiovascular responsesinduced by hemodialysis [10,12,20] may be suggested as a mechanism involved in the responses of the parasympathetic modulation of the heart.…”

“…We believe that the sympathetic activation did not significantly influence the cardiac autonomic modulation in hemodynamically stable patients with renal disease and that the increase in the global modulation of the heart occurred as a response to the initial activation of the sympathetic nervous system. This initial response of the autonomic nervous system activation is presented with cardiac protective as tonic response of the autonomic reflexes in order to stabilize cardiac functions promoting improved global functions during and after hemodialysis [18][19][20].…”