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Electrophysiological effects of glucose-insulin-potassium on sinus node function in patients with and without sinus
Cardiovascular Research
|October 1, 1982
Summary
Glucose-insulin-potassium infusion (GIK) improved sinus node function in patients with sinus node dysfunction (SND). GIK significantly shortened cycle length and corrected sinus node recovery time in SND patients, unlike in controls.
Area of Science:
- Cardiology
- Electrophysiology
Background:
- Sinus node dysfunction (SND) affects heart rhythm regulation.
- Electrophysiological assessment is crucial for understanding SND.
Purpose of the Study:
- To investigate the electrophysiological effects of glucose-insulin-potassium (GIK) infusion on sinus node function.
- To determine if GIK benefits patients with SND.
Main Methods:
- Studied 14 control subjects and 11 SND patients.
- Administered GIK infusion and measured sinus node parameters (spontaneous cycle length, corrected sinus node recovery time, sinoatrial conduction time).
- Administered mannitol as a control in a separate experiment.
Main Results:
- GIK significantly decreased spontaneous cycle length in both control (17%) and SND (33%) groups.
- GIK significantly reduced corrected sinus node recovery time (40%) and sinoatrial conduction time (27%) in SND patients.
- Mannitol had no significant effect on electrophysiological parameters.
Conclusions:
- GIK infusion demonstrates a beneficial effect on sinus node dysfunction.
- GIK may be a therapeutic option for managing SND.