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[Risk stratification in non ischemic cardiomyopathy: a case report--Case 5/2010]
U Parade1, K Klingel, R Kandolf
1Abteilung für Kardiologie, Medizinische Universitätsklink Tübingen. U.Parade@klinikum-stuttgart.de <U.Parade@klinikum-stuttgart.de>
Deutsche Medizinische Wochenschrift (1946)
|June 2, 2010
Summary
Risk stratification for sudden cardiac death in non-ischaemic cardiomyopathy (NICM) is challenging. While traditional predictors are unreliable, cardiac MRI and autonomic dysfunction markers may aid risk assessment in NICM patients.
Area of Science:
- Cardiology
- Cardiac Electrophysiology
- Cardiomyopathy Research
Background:
- Non-ischaemic cardiomyopathy (NICM) presents diagnostic challenges for sudden cardiac death risk stratification.
- Established predictors for ischaemic cardiomyopathy, like heart rate turbulence and T-wave alternans, lack utility in NICM.
Observation:
- A patient with NICM and severe left ventricular dysfunction showed improvement after cardioversion and heart failure treatment.
- Cardiac MRI revealed reduced left ventricular function, mitral regurgitation, and septal late enhancement.
- Myocardial biopsies indicated remodelling, fibrosis, and mononuclear infiltrates.
Findings:
- Prognosis in NICM does not directly correlate with left ventricular function severity.
- Cardiac MRI and markers of autonomic dysfunction show potential for risk stratification in NICM.
- The role of late enhancement as a substrate for arrhythmias requires further investigation.
Implications:
- Non-invasive risk stratification may assist in borderline cases but is not mandatory for NICM.
- Close clinical monitoring under optimal medical therapy is recommended.
- Implantable cardioverter-defibrillator (ICD) implantation is superior for persistent depressed left ventricular function, though optimal timing in new NICM is undetermined.
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