Analysis of Left-Ventricular Changes Associated with Chronic Hemodialysis

To assess the reasons for the frequent cardiovascular complications in patients with end-stage renal disease (ESRD), 61 out of 131 normotensive ESRD patients originally examined (mean ESRD duration: 71 +/- 41 months) were followed over 2.5 years by echo-, electro- and mechanocardiography. Clinical and biochemical parameters were comparable. The prevalence of pericardial effusion (3%), pericardial thickening (14%), aortic valve sclerosis (14%) and mitral valve anulus sclerosis (12%) was unchanged. The interventricular septum diameter (14.3 +/- 3.0 vs. 16.4 +/- 3.4 mm), index of left-ventricular (LV) wall asymmetry (1.25 +/- 0.30 vs. 1.52 +/- 0.36) and left atrial diameter (38.3 +/- 5.4 vs. 42.6 +/- 3 mm) increased (p less than 0.001). The LV end-systolic diameter decreased slightly (35.8 + 6.3 vs. 34.2 +/- 6.4 mm; p less than 0.05), with no significant changes for end-diastolic diameter (50.4 +/- 6.3 vs. 49.3 +/- 6.1 mm), muscle mass index (189 +/- 57 vs. 197 +/- 50 g/m2), stroke volume (86.1 +/- 26.2 vs. 85.7 +/- 26.7 7 ml/m2) and fractional shortening (29.1 +/- 7 vs. 30.8 +/- 8.6%). We conclude that the predominant finding in ESRD is an LV hypertrophy progressing towards an asymmetric septum hypertrophy, while the increase of the primarily enlarged left atrial diameter over 30 months reflects a further deterioration of the diastolic LV dysfunction.