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Eur J Cardiothorac Surg 2005;28:448-453
© 2005 Elsevier Science NL

Original articles

Echocardiographic findings using tissue velocity imaging following passive containment surgery with the Acorn CorCap^TM cardiac support device

Departments of Clinical Physiology and Thorax, Section of Cardiothoracic Surgery, Karolinska University Hospital, S-171 76 Stockholm, Sweden

Received 30 March 2005; received in revised form 13 May 2005; accepted 16 May 2005.

^* Corresponding author. Tel.: +46 8 517 708 26; fax: +48 6 32 27 01. (Email: andfra{at}mbox.ki.se).

Abstract

Objective: To echocardiographically evaluate the effects of passive containment surgery using the CorCap^TM Cardiac Support Device in heart failure patients with dilated cardiomyopathy. Methods: Twelve patients with dilated cardiomyopathy subjected to cardiac surgery received the Cardiac Support Device. Patients with ischemic cardiomyopathy (n=5) underwent coronary artery bypass surgery receiving 1–3 bypass grafts. In the idiopathic cardiomyopathy group (n=7), mitral valve annuloplasty was performed in five patients while two patients received the Cardiac Support Device only. Results: Following surgery there was a gradual, sustained improvement in cardiac dimensions (decreased left ventricular end-diastolic diameter and left ventricular end-systolic diameter) combined with an increase in functional status (6-min walk and NYHA class). Concomitantly there was a marked decrease in right ventricular function (decrease in tricuspid annular systolic and diastolic velocities) while the left ventricular function (mitral annular systolic and diastolic velocities) and output (ejection fraction, stroke volume) remained unchanged. Conclusions: Addition of the Cardiac Support Device to conventional cardiac surgery improves patient status and decreases left ventricular size in heart failure patients with dilated cardiomyopathy. The positive effect on left ventricular dimensions is not accompanied by any improvement in cardiac output but rather right ventricular dysfunction, although the functional significance of this is unclear.

Key Words: CorCap^TM Cardiac Support Device • Dilated cardiomyopathy • Heart failure • Passive containment surgery • Tissue velocity imaging

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