Diastolic dysfunction and mortality in diabetic patients on hemodialysis: a 4.25-year controlled prospective study

Lerida M A Zaslavsky1, Antonio F Pinotti, Jorge L Gross

  • 1Endocrine Division, Hospital de Clínicas de Porto Alegre, Universidade Federal do Rio Grande do Sul, Brazil.

Insights

Diabetic patients on hemodialysis face higher mortality, primarily from cardiovascular issues. Echocardiographic abnormalities, specifically left ventricular diastolic dysfunction, predict death in these patients.

Area of Science:

  • Nephrology
  • Cardiology
  • Diabetology

Background:

  • Patients undergoing hemodialysis have elevated mortality rates, particularly diabetic individuals, often due to cardiovascular complications.
  • Diabetes exacerbates cardiovascular risks in hemodialysis patients, necessitating better predictive tools for mortality.

Purpose of the Study:

  • To assess the predictive value of echocardiographic abnormalities for mortality in diabetic patients initiating hemodialysis.
  • To identify specific echocardiographic patterns associated with increased mortality risk in this population.

Main Methods:

  • A 4.25-year prospective study involving 40 diabetic and 28 nondiabetic patients starting hemodialysis.
  • Cardiovascular assessment included ECG, myocardial scintigraphy, and M-mode/Doppler echocardiography to evaluate left ventricular diastolic function (LVDD).
  • Survival analysis utilized Kaplan-Meier curves and Cox proportional-hazards models to identify mortality predictors.

Main Results:

  • Overall mortality was significantly higher in diabetic patients (47.5%) compared to nondiabetic patients (7.1%).
  • Pseudonormal and restrictive left ventricular diastolic filling patterns were significant predictors of mortality (HR: 3.2).
  • The presence of diabetes itself was also associated with increased mortality risk (HR: 4.7).

Conclusions:

  • Left ventricular diastolic dysfunction (LVDD) emerged as the primary predictor of mortality in both diabetic and nondiabetic patients starting hemodialysis.
  • Intensified management of cardiovascular risk factors before and during dialysis may improve survival rates for diabetic patients.
  • Echocardiographic evaluation of LVDD is crucial for risk stratification in hemodialysis patients, especially those with diabetes.

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