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Multislice CT in graft vascular disease. A pilot study
1Cardiology Department La Fe University Hospital, Valencia, Spain. moro@uv.es
Insights
Multislice CT shows promise for detecting graft vessel disease (GVD) in heart transplant patients, offering a high negative predictive value. This non-invasive technique aids in screening for GVD, potentially reducing the need for invasive diagnostic procedures.
Area of Science:
- Cardiology
- Radiology
- Transplant Medicine
Background:
- Graft vessel disease (GVD) is a major long-term complication following heart transplantation (HT).
- Current GVD diagnosis relies on invasive methods, highlighting the need for alternative techniques.
- Multislice CT (MSCT) offers non-invasive visualization of coronary anatomy, including lumen and wall thickness.
Purpose of the Study:
- To evaluate the diagnostic value of 16-detector multislice CT (MSCT) for detecting GVD in HT patients.
- To compare MSCT findings against traditional invasive methods like angiography and intravascular ultrasound (IVUS).
Main Methods:
- A study involving 32 heart transplant patients with a mean follow-up of 2016 days.
- 16-detector MSCT was performed within 24 hours before angiography.
- IVUS was used for confirmation when angiography results were normal; statistical analysis determined sensitivity, specificity, and predictive values.
Main Results:
- The study included 30 patients for CT assessment after exclusions.
- MSCT demonstrated a sensitivity of 50%, specificity of 81%, negative predictive value of 81%, positive predictive value of 50%, and precision of 72% compared to invasive methods.
- A high negative predictive value suggests MSCT's effectiveness in ruling out GVD.
Conclusions:
- 16-detector MSCT shows good performance for screening GVD in heart transplant recipients.
- The technique's high negative predictive value supports its utility in identifying patients without GVD.
- Future research will involve larger cohorts and advanced 64-detector CT for improved resolution.
Introduction:
Graft vessel disease (GVD) is one of the main long-term complications in heart transplant (HT) patients. At present, the diagnosis of this complication requires invasive procedures. Multislice CT is an emerging technique that allows visualization of the coronary anatomy, including the vascular lumen and wall thickness. Our objective was to establish the value of 16-detector multislice CT in the detection of GVD, compared with angiography and intravascular ultrasound (IVUS).
Patients And Methods:
We studied 32 HT patients, who had a mean follow-up of 2016 days. CT was performed 24 hours prior to angiography, associated with IVUS if the latter proved normal. Comparisons were subsequently made using contingency tables to establish the sensitivity, specificity, and predictive values of the CT.
Results:
Angiography was not performed on two patients, and eight were excluded from CT assessment due to serum creatinine values >1.5 mg/dL. Comparison of the CT findings with the invasive techniques yielded a sensitivity of 50%, a specificity of 81%, a negative predictive value of 81%, a positive predictive value of 50%, and a precision of 72%.
Conclusions:
Our results suggested good performance of the technique in screening for GVD because a high negative predictive value was recorded. We plan to increase the number of patients and use the 64-detector CT system to ensure greater time and spatial resolution.
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