Why the study?
Does intravenous amiodarone alter sinuatrial node function in patients?
Does intravenous amiodarone alter sinuatrial node function in patients?
Intravenous amiodarone prolongs corrected sinus node recovery time and may depress conduction of atrial responses to the sinus node, without significantly changing sinus cycle length.
May warrant caution with IV amiodarone in sinus node dysfunction; leaves open clinical relevance pending larger controlled studies.
The effects of amiodarone on the sinuatrial node were studied in 24 patients after an intravenous injection of the drug (5 mg/kg). Sinuatrial function was assessed by rapid atrial pacing and premature atrial stimulation. Sinus cycle length did not change significantly, but the corrected sinus node recovery time was prolonged. While there was no significant change in sinuatrial conduction time, prolongation of the non-reset zone in 14 cases, as well as the abolition of the platesu in 2/24 patients, suggested that conduction of the atrial responses to the sinus node might have been depressed.
No takes yet. Share an insight, caveat, or question.
Touboul et al. (1979) studied this question.
Synapse has enriched 3 closely related papers on similar clinical questions. Consider them for comparative context: