These tools will no longer be maintained as of December 31, 2024. Archived website can be found here. PubMed4Hh GitHub repository can be found here. Contact NLM Customer Service if you have questions.


Pubmed for Handhelds

PUBMED FOR HANDHELDS

Search MEDLINE/PubMed

  • Title: Electrophysiologic actions of lidocaine in a canine model of chronic myocardial ischemic damage--arrhythmogenic actions of lidocaine.
    Author: Patterson E, Gibson JK, Lucchesi BR.
    Journal: J Cardiovasc Pharmacol; 1982; 4(6):925-34. PubMed ID: 6185784.
    Abstract:
    Lidocaine facilitated the induction of ventricular arrhythmias by programmed electrical stimulation in 16 dogs, 5 to 14 days after a temporary (90-min) occlusion of the left anterior descending coronary artery. In these 16 animals, programmed stimulation failed to produce ventricular tachyarrhythmias in any animal before lidocaine administration (3 mg/kg), while after lidocaine administration, programmed stimulation produced nonsustained ventricular tachycardia in four animals (25%), sustained ventricular tachycardia in nine animals (56%), and ventricular fibrillation in one animal (6%). Delayed electrical activity in ischemically injured ventricular myocardium produced by premature ventricular stimuli (mean +/- SD = 179 +/- 34 ms) was delayed further by the administration of lidocaine (237 +/- 42 ms, p less than 0.01), resulting in continuous local electrical activity between the final premature ventricular stimulus and the initial beat of the resultant ventricular tachycardia. Lidocaine administration did not alter myocardial refractoriness in normal ventricular tissue, but it prolonged refractoriness in ischemically injured ventricular myocardium. These results show that lidocaine can have arrhythmogenic actions when administered in the presence of existing ischemic injury, possibly the result of increased delay in activation of ischemically injured ventricular myocardium with localized reentry of myocardial electrical activity.
    [Abstract] [Full Text] [Related] [New Search]