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Correlates of subclinical left ventricular dysfunction in ESRD.
Robert Fathi1, Nicole Isbel, Brian Haluska
1University of Queensland, Brisbane, Australia.
Summary
Subclinical left ventricular (LV) dysfunction is common in end-stage renal disease (ESRD) patients, primarily affecting diastolic function. Key factors include age, diabetes, hypertension, and LV mass, not ESRD alone.
Area of Science:
- Nephrology
- Cardiology
- Cardiovascular Medicine
Background:
- Left ventricular abnormalities are prevalent in end-stage renal disease (ESRD) patients.
- Subclinical left ventricular (LV) dysfunction is a concern in ESRD.
- The study aimed to identify causes of LV dysfunction in ESRD independent of hypertrophy and coronary artery disease.
Purpose of the Study:
- To identify causes of subclinical left ventricular (LV) dysfunction in patients with end-stage renal disease (ESRD).
- To determine if ESRD itself is associated with LV dysfunction, independent of LV hypertrophy and coronary artery disease.
Main Methods:
- 145 ESRD patients and controls underwent assessment of cardiovascular risk factors and dialysis adequacy.
- Dobutamine stress echocardiography, myocardial Doppler, 3D echocardiography for LV volumes/mass, and brachial artery reactivity (BAR) were used.
- Regional cardiac function, LV volumes/mass, and vascular function were quantified.
Main Results:
- LV diastolic velocity was impaired in ESRD patients; systolic velocity showed no significant difference.
- Age, diabetes mellitus, hypertension, and LV mass predicted diastolic velocity.
- Age and risk factor number predicted systolic velocity, but no association was found between BAR and risk factors.
Conclusions:
- Subclinical LV dysfunction in ESRD manifests as abnormal diastolic, not systolic, function.
- Abnormal LV function correlates with age, diabetes, hypertension, and LV mass.
- ESRD alone, dialysis adequacy, or abnormal endothelial function were not direct correlates.