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Chronic ischemic left ventricular dysfunction: from pathophysiology to imaging and its integration into clinical
Shahbudin H Rahimtoola1, Vasken Dilsizian, Christopher M Kramer
1Griffith Center, Division of Cardiovascular Medicine, Department of Medicine, LAC+USC Medical Center, University of Southern California, Los Angeles, California 90033, USA. rahimtoo@usc.edu
JACC. Cardiovascular Imaging
|April 10, 2009
Summary
Diagnosing myocardial viability is crucial for patients with chronic ischemic left ventricular dysfunction. Noninvasive tests, often used in combination, help identify hibernating myocardium for improved treatment outcomes.
Area of Science:
- Cardiology
- Medical Imaging
- Heart Failure Research
Background:
- Chronic ischemic left ventricular dysfunction impacts numerous patients.
- Myocardial revascularization improves function, class, and survival in specific syndromes.
- Early diagnosis and treatment of myocardial viability are critical.
Purpose of the Study:
- To highlight the importance of diagnosing myocardial viability.
- To evaluate diagnostic methods for hibernating myocardium.
- To emphasize the need for integrated testing strategies.
Main Methods:
- Review of diagnostic modalities for myocardial viability.
- Assessment of coronary arteriography's limitations.
- Focus on noninvasive testing for hibernating myocardium.
- Development of algorithms for test integration.
Main Results:
- Coronary arteriography has limited diagnostic value for viability.
- Noninvasive tests correlate with pathophysiologic changes in hibernating myocardium.
- No single noninvasive test offers perfect sensitivity and specificity.
- Combined testing approaches are typically required.
Conclusions:
- Accurate diagnosis of myocardial viability is essential for guiding revascularization therapy.
- Noninvasive testing plays a key role in identifying hibernating myocardium.
- Integrated diagnostic algorithms improve clinical decision-making for left ventricular dysfunction.
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