Involvement of FFA Metabolism and Insulin Resistance in Cardiac Death (CD_HD_FAIR)
The investigators evaluated predictive values of myocardial fatty acid metabolism and insulin resistance for cardiac death of hemodialysis patients with normal coronary arteries.
Coronary Artery Disease
|Study Design:||Observational Model: Cohort
Time Perspective: Prospective
|Official Title:||Prediction of Impaired Myocardial Fatty Acid Metabolism and Insulin Resistance for Cardiac Death of Hemodialysis Patients With Normal Coronary Arteries|
- Cardiac death [ Designated as safety issue: No ]
- All-cause death [ Designated as safety issue: No ]
|Study Start Date:||January 2001|
|Study Completion Date:||December 2004|
Myocardial fatty acid metabolism, Insulin resistance
Myocardial fatty acid metabolism was evaluated by myocardial fatty acid imaging using BMIPP SPECT.
Insulin resistance was evaluated by HOMA-IR.
Dialysis patients have extraordinarily high mortality rates. Cardiac diseases play an important role in deaths among end-stage renal disease (ESRD) patients undergoing renal replacement therapy. Previous studies have shown that maintenance hemodialysis patients have high prevalence of obstructive coronary artery disease. While obstructive coronary artery disease is undoubtedly involved in cardiac deaths induced by acute myocardial infarction or congestive heart failure and in sudden cardiac death, cardiac death can occur in hemodialysis patients who have apparently no pre-existing obstructive coronary artery disease. However, few studies have investigated the factors which are useful for stratifying the risk of cardiac death in dialysis patients with normal coronary arteries.
We recently showed that visualizing severely impaired myocardial fatty acid metabolism on images can help not only to detect obstructive coronary artery disease , but also to identify patients at high risk of cardiac death among hemodialysis patients without coronary intervention or old myocardial infarction and among those with coronary revascularization by percutaneous coronary artery intervention. In addition, combination of impaired cardiac fatty acid metabolism with insulin resistance, which is one of the risk factors related with coronary atherosclerosis, may contribute to left ventricular dysfunction in patients with maintenance hemodialysis with normal coronary arteries. Impaired myocardial fatty acid metabolism and insulin resistance, both of which reduce the synthesis of myocardial adenosine triphosphate (ATP), are likely to be involved in fatal cardiac events by causing deficiency of myocardial energy supply. In this study, we prospectively investigated the potential of myocardial fatty acid metabolism and insulin resistance to predict cardiac death in hemodialysis patients without pre-existing obstructive coronary artery disease.