J Korean Radiol Soc.  2008 Apr;58(4):357-363. 10.3348/jkrs.2008.58.4.357.

Assessment of Left Ventricular Function after Mitral Valvular Replacement Using Multidetector Row Computed Tomography: Initial Experience

• Kim DH
• Byun JN
• Ryu SW
• Choi SI

• KMID: 1479099
• DOI: http://doi.org/10.3348/jkrs.2008.58.4.357

Abstract

PURPOSE
To assess the usefulness of cardiac MDCT for the evaluation of cardiac function and morphology of mitral valve replacement (MVR) with or without subvalvular preservation.
MATERIALS AND METHODS
Sixteen patients with (n = 10) or without (n = 6) subvalvular sparing and control subjects (n = 6) were evaluated using 16-slice MDCT (Sensation 16, Siemens, Erlangen, Germany). Images of MDCT were reconstructed for the evaluation of cardiac morphology and ventricular function. Patients were compared with respect to variables such as ejection fraction (EF), end-diastolic volume (EDV), end-systolic volume (ESV), and the diastolic-systolic left ventricular area ratio on a short-axis view at apical, mid-ventricular, and basal levels.
RESULTS
The average values for cardiac function variables for control subjects and after MVR (with subvalvular preservation versus without subvalvular preservation) were, respectively, 54 +/- 8%, 54 +/- 7% and 44 +/- 6 %, for EF; 91 +/- 28 ml, 108 +/- 35 ml and 99 +/- 33 ml for EDV; 43 +/- 19 ml, 52 +/- 24 ml and, 56 +/- 21 ml for ESV. The area ratio was 2.56, 2.75, 2.09 at the apex; 2.20, 2.17, 1.56 at the mid-ventricular level; 1.90, 1.87, 1.76 at the basal level, respectively. Mid ventricular contraction for patients following subvalvular resection was significantly decreased (p < 0.05).
CONCLUSION
MDCT is a useful diagnostic modality for functional and morphologic evaluation of MVR.

Keyword

Heart; Mitral valve stenosis; Ventricular fuction, left; Heart valve prosthesis

MeSH Terms

Contracts
Heart
Heart Valve Prosthesis
Humans
Mitral Valve
Mitral Valve Stenosis
Ventricular Function
Ventricular Function, Left