Related Experiment Videos
Erythrityl tetranitrate: sustained effects on systolic time intervals. changes consistent with sustained preload
The American Journal of the Medical Sciences
|March 1, 1979
Summary
Chewable erythrityl tetranitrate effectively reduces preload in coronary heart disease patients for at least four hours. This long-acting nitrate demonstrates significant physiological effects, improving cardiac function metrics.
Area of Science:
- Cardiology
- Pharmacology
Background:
- Sustained preload reduction is a known effect of several nitrates.
- Erythritol tetranitrate's effects on preload reduction have not been previously established.
Purpose of the Study:
- To investigate the effects of chewable erythritol tetranitrate on preload reduction in patients with coronary heart disease.
- To determine the duration of these physiological effects.
Main Methods:
- A randomized, double-blind, crossover clinical trial was conducted.
- Seven patients with coronary heart disease participated in the study.
- Systolic time intervals were measured after administration of 10 mg chewable erythritol tetranitrate compared to placebo.
Main Results:
- Erythritol tetranitrate administration resulted in significant changes in systolic time intervals, indicating preload reduction.
- The ejection time index (ETI) decreased significantly between 6 and 90 minutes post-administration.
- The pre-ejection period (PEP), isovolumic contraction time (IVCT), and PEP/LVET ratio increased significantly from 22 minutes to the 4-hour endpoint.
Conclusions:
- Chewable erythritol tetranitrate is a physiologically effective agent for preload reduction.
- The effects of erythritol tetranitrate are long-acting, persisting for at least four hours in patients with coronary heart disease.