June 20, 2026Journal of the American College of Cardiology
A standardized definition of ischemic cardiomyopathy for use in clinical research
Key result
Ischemic HF and extensive CAD linked to shorter survival versus nonischemic HF.
- n=1,921
Why the study?
An ischemic etiology of HF predicts adverse outcome, but there is no uniform definition for ischemic cardiomyopathy.
Population
1,921 patients with symptomatic HF and ejection fraction <= 40% undergoing diagnostic coronary angiography
Comparison
Five classification schemes defining the extent of CAD
Design
Cohort study
Authors
Discussion
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Implication
Modified CAD classification may refine HF prognosis; leaves open effects on management and trial eligibility.
Key Points
- To evaluate the relationship between coronary artery disease and survival in heart failure patients while establishing a standardized definition of ischemic cardiomyopathy.
- Analyzed clinical history and coronary anatomy of 1,921 heart failure patients with ejection fraction ≤ 40% from 1986 to 1999.
- Tested five classification schemes to determine the best method for defining the extent of coronary artery disease.
- Developed a definition of ischemic cardiomyopathy with prognostic power based on classification of disease severity.
- Extended coronary artery disease is significantly correlated with shorter survival rates in heart failure patients.
- A modified classification method categorizing patients with single-vessel disease as nonischemic showed superior prognostic accuracy.
- Standardization of ischemic cardiomyopathy will enhance the consistency and quality of clinical research outcomes in heart failure.
Study Design
Type
Cohort (n=1,921)
PICO
P
Population
1,921 patients with symptomatic heart failure and ejection fraction ≤40% undergoing diagnostic coronary angiography between 1986 and 1999.
E
Exposure / Comparator
Ischemic etiology of heart failure / Extent of coronary artery disease vs Nonischemic heart failure
O
Primary Outcome
Survival
Cite This Study
Felker et al. (2002) conducted a cohort in Symptomatic heart failure (n=1,921). Ischemic etiology of heart failure / Extent of coronary artery disease vs. Nonischemic heart failure was evaluated on Survival. Angiographically diagnosed ischemic heart failure and more extensive coronary artery disease were independently associated with shorter survival compared to nonischemic heart failure.