[Objectivation of the cardiac insufficiency load index--a comparison between spiroergometry and stretch-index]

It was shown that reduction in exercise capacity because of latent heart insufficiency could be significantly demonstrated by the so-called pre-ejection index PI, measured under conditions of rest. On the other hand, normals did not show any significant interrelation between PI and parameters related to exercise capacity, obtained by spiroergometric measurements. The pre-ejection index PI is a non-invasive parameter which compares the pre-ejection period in upright and supine posture. Since spiroergometric measurements could not be made under vita-maxima conditions, PI values were compared with parameters of submaximal exercise. Exercise was performed on the bicycle ergometer, with oxygen consumption and heart rate being recorded. Measuring results also revealed that by means of the pre-ejection index the necessity and effectiveness of glycoside medication may be objectively defined. Measuring techniques are described and statistically processed data are presented.