[Dysfunction of the left chamber after myocardial infarct]

Dysfunction of the left chamber of the heart happens when the function is not sufficient to supply all organs with needed quantity of blood, oxygen and nourishing materials. Consequence is an exhaustion of the heart compensatory and peripheral mechanisms. The research is based on the results of the analysis of residual changes that remained since acute myocardium infarct got over (scar, contracture changes, conductivity) and analysis of the remained functional part of the left chamber myocardium. Electrocardiogram, echocardiography and exercise test were used. 60 patients were examined. 6 varieties of chronic myocardium infarcts were found: anteroseptal, inferior, anterolateral and anterior-broaden, high-lateral and posterior localisation. Wagner's method QRS-scoring system and scores for wall motion by the American of ehocardiography were found the damage size of the myocardium mass. Correlative coefficient is full (r = 1.0). In chi2-test there is no significant difference (Wagner, echocardiography) in dimensions of old infarct (p < 0.05). Dyastolic dysfunction was set by echocardiographic method for 75%, systolic 41.11% examinees, remodelling in 80%, extended isovolumetric relaxation time and time of deceleration in 100% cases, speed ratio E-wave and A-wave below 1.0 in 82.66% cases. Exercise test was made for 85% examinees. Dysfunction was registered in 84.37%, diastolic in 80.39%, systolic in 43.17% cases. On the base of coronarographie results (23.33% examinees) the sensitivity was set for: exercise test in systolic dysfunction is 42.86%, in dyastolic is 71.43% and echocardiography in systolic disfunction is 57.14%, in dyastolic 100%. According to echocardiographic analysis of parameters the greatest influence has reduction of ejection fraction with 36.67% in systolic and extension of the period of deceleration with 38.79% in diastolic dysfunction. There is a good complement of the tested methods (p < 0.05). There is possibility, with these methods to appraise dysfunction of the left chamber in old myocardium infarct with conclusion that echocardiography is more sensitive since gives more data and direct visualization of changes.