[Comparison of dynamic and isometric loading in echocardiographic examinations in patients with ischemic heart...

The objective of the work was to compare functional indicators of the left ventricle during isometric (HG) and dynamic (Ergo) echocardiographic load examinations in patients with different grades of ischaemic heart disease. In group A they compared results in 34 patients with affection of three coronary arteries and in group B 15 patients with 1-2 coronary arteries affected. They evaluated the systolic, diastolic blood pressure, heart rate (HR), the index of the diastolic end volume EDV/m2, the index of the systolic end volume ESV/m2, Limacher's index for evaluation of left ventricular motility and the left ventricular ejection fraction (EF) at rest and after both types of loads. The EDV/m2 index increased in group A by 5.2 ml during an isometric load and by 10.4 ml during a dynamic load, in group B it increased by 1.6 and 7.0 ml resp. The values of the ESV/m2 index increased in group A by 8.5 ml during the isometric load and by 14.0 ml during the dynamic load, in group B by 4.1 and 10.8 ml resp. EF values at rest were similar in both groups: group A: 51.4%, B: 51.5%. During the isometric load the EF declined to 45.3% in group A and to 47,1% in group B. During the dynamic load the EF declined to 42% in group A and 42.5 in group B. The dynamic load produces, as compared with the isometric one, a statistically more significant drop of Limacher's index and greater volumetric changes of the left ventricular cavity in the group with 1-2 affected coronary arteries, as compared with the isometric load. In patients with three affected coronary arteries the volumetric changes during an isometric load are comparable with changes after a dynamic load.