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60<br />

frazione di eiezione ≤30% e tachicardie ventricolari non sostenute, sottoposti a impianto<br />

“prof<strong>il</strong>attico” di defibr<strong>il</strong>latore, vi è un <strong>in</strong>cidenza di <strong>in</strong>terventi appropriati del defibr<strong>il</strong>latore paragonab<strong>il</strong>e<br />

a quella r<strong>il</strong>evata <strong>in</strong> pazienti con storia di s<strong>in</strong>cope e di tachicardie ventricolari sostenute<br />

o fibr<strong>il</strong>lazioni ventricolari documentate. (8)<br />

Sono attesi per <strong>il</strong> 2004 i risultati del Sudden Cardiac Death <strong>in</strong> Heart Fa<strong>il</strong>ure Trial (SCD-HeFT),<br />

<strong>in</strong> cui 2500 pazienti con cardiomiopatia ischemica o non ischemica e frazione di eiezione<br />

<strong>in</strong>feriore a 35% sono stati randomizzati ad amiodarone o a defibr<strong>il</strong>latore impiantab<strong>il</strong>e.<br />

Sulla sp<strong>in</strong>ta di queste considerazioni, pur consci dell’op<strong>in</strong>ab<strong>il</strong>ità della scelta, abbiamo impiantato<br />

alla paziente un defibr<strong>il</strong>latore automatico, nell’attesa del trapianto cardiaco.<br />

BIBLIOGRAFIA<br />

1. Gregory F, Michaud S, Adam S et al. Should an Abnormal Serum Potassium Concentration Be<br />

Considered a Correctable Cause of Cardiac Arrest? J Am Coll Cardiol, 2001;38: 1224–5.<br />

2. Anderson JL, Hallserop AP, Epste<strong>in</strong> AE et al. Design and results of the antiarrhythmics vs implantable<br />

defibr<strong>il</strong>lators (AVID) registry. Circulation, 1999;99:1692-9.<br />

3. Bänsch D, Antz M, Boczor S et al. Primary prevention of sudden sardiac death <strong>in</strong> idiopathic d<strong>il</strong>ated<br />

cardiomyopathy The Cardiomyopathy Trial (CAT) Circulation. 2002;105:1453-8.<br />

4. Ezekowitz JA, Armstrong PW, McAlister FA. Implantable cardioverter defibr<strong>il</strong>lators <strong>in</strong> primary and<br />

secondary prevention: A systematic review of randomized controlled trials Ann Intern Med.<br />

2003;138:445-2.<br />

5. Fonarow GC, Feliciano Z, Boyle NG et al. Improved survival <strong>in</strong> patients with non-ischemic advanced<br />

heart fa<strong>il</strong>ure and syncope treated with an implantable cardioverter-defibr<strong>il</strong>lator. Am J Cardiol<br />

2000;85:981-5.<br />

6. Gronefeld G, Hohnloser SH. What do implantable cardioverter/defibr<strong>il</strong>lators teach us about the<br />

mechanisms of sudden cardiac death? Cardiovasc Res 2001; 50:232-41<br />

7. Cappato R, Negroni S, Bentivegna S et al. Role of implantable cardioverter defibr<strong>il</strong>lators <strong>in</strong> d<strong>il</strong>ated<br />

cardiomyopathy. J Cardiovasc Electrophysiol, 2002;13:S106-9.<br />

8. Grimm W, Hoffmann J, Müller H et al. Implantable Defibr<strong>il</strong>lator Event Rates <strong>in</strong> Patients With Idiopathic<br />

D<strong>il</strong>ated Cardiomyopathy, Nonsusta<strong>in</strong>ed Ventricular Tachycardia on Holter and a Left Ventricular<br />

Ejection Fraction Below 30%. J Am Coll Cardiol, 2002;39:780-7.

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