This study seeks to compare aortic dimension changes during cardiac cycle in patients with and without aortic valve calcification and to evaluate its correlation with aortic valve calcium score in former group.
The study population comprised 104 patients referred to three cardiac imaging centers for coronary multislice computed tomography, including 52 patients with aortic valve calcification as the study group and 52 subjects without evidence of calcification in their aortic valve, who served as a control group. Data were reconstructed at each 10% of RR-interval during the cardiac cycle and reconstructed images at 30-35% and 70-75% of R-R intervals were obtained, representing systole and diastole, respectively. For diastolic phase, in most cases images at 70% were acquired. Thereafter, acquired images were transferred to a single remote workstation for post-processing and subsequent off-line analysis.
Study Type
OBSERVATIONAL
Enrollment
104
Modarres Hospital
Tehran, Iran
Day General Hospital
Tehran, Iran
Rajaie Cardiovascular medical and Research Center
Tehran, Iran
Evidence of aortic root dimension change confirmed by multislice CT in systolic phase (30% of R-R interval) compared to diastolic phase (70% of R-R interval) after retrospective ECG gating
Detailed information about aortic root dimension changes during cardiac cycle has become of utmost interest especially after introduction of transcatheter aortic valve implantation (TAVI) as an alternative therapeutic procedure in patients with severe aortic stenosis, in that paravalvular regurgitation and procedural failure will ensue from errors in selecting the appropriate prosthesis size
Time frame: during a few heat beat (8 to 13 seconds)
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