Coronary revascularization treatment based on dual-source computed tomography
R Dikkers1, T P Willems, L H Piers
1Department of Radiology, University Medical Center Groningen, University of Groningen, Hanzeplein 1, P.O. Box 30.001, 9700 RB, Groningen, The Netherlands. r.dikkers@rad.umcg.nl
Insights
Dual-source computed tomography (DSCT) provides high sensitivity and negative predictive value for assessing coronary artery disease, safely guiding therapy decisions. This allows patients to receive appropriate treatment, whether revascularization or medical therapy alone.
Area of Science:
- Cardiovascular Imaging
- Radiology
- Interventional Cardiology
Background:
- Coronary angiography (CAG) is the gold standard for assessing coronary artery stenosis but is invasive.
- Dual-source computed tomography (DSCT) offers a non-invasive alternative for evaluating coronary artery disease (CAD).
- Comparing the diagnostic accuracy and therapeutic implications of DSCT versus CAG is crucial for clinical decision-making.
Purpose of the Study:
- To compare the diagnostic performance of DSCT with CAG in guiding therapy for patients with suspected coronary artery disease.
- To evaluate the 1-year clinical outcomes and therapeutic advice based on DSCT findings compared to CAG.
- To determine the safety and efficacy of DSCT in selecting patients for revascularization versus medical management.
Main Methods:
- Thirty-three patients underwent both DSCT and CAG, with independent evaluations by a radiologist and cardiologist.
- Therapy recommendations were based on significant stenosis identified by DSCT and CAG, adhering to current guidelines.
- Patient treatment was determined by a multidisciplinary team, considering all clinical information and imaging results.
Main Results:
- CAG demonstrated higher specificity (91%) and positive predictive value (PPV) (95%) than DSCT (82%, 91%).
- DSCT exhibited higher sensitivity (96%) and negative predictive value (NPV) (89%) compared to CAG (91%, 83%).
- DSCT-based therapy advice did not result in denying necessary revascularization; two patients required additional procedures during follow-up.
Conclusions:
- DSCT is a highly sensitive and specific tool for evaluating coronary artery disease, comparable to CAG.
- The high NPV of DSCT supports its use in identifying patients suitable for medical therapy alone, potentially avoiding unnecessary invasive procedures.
- DSCT can be safely integrated into clinical practice for guiding revascularization decisions in patients with suspected coronary artery disease.
Abstract:
Therapy advice based on dual-source computed tomography (DSCT) in comparison with coronary angiography (CAG) was investigated and the results evaluated after 1-year follow-up. Thirty-three consecutive patients (mean age 61.9 years) underwent DSCT and CAG and were evaluated independently. In an expert reading (the "gold standard"), CAG and DSCT examinations were evaluated simultaneously by an experienced radiologist and cardiologist. Based on the presence of significant stenosis and current guidelines, therapy advice was given by all readers blinded from the results of other readings and clinical information. Patients were treated based on a multidisciplinary team evaluation including all clinical information. In comparison with the gold standard, CAG had a higher specificity (91%) and positive predictive value (PPV) (95%) compared with DSCT (82% and 91%, respectively). DSCT had a higher sensitivity (96%) and negative predictive value (NPV) (89%) compared with CAG (91% and 83%, respectively). The DSCT-based therapy advice did not lead to any patient being denied the revascularization they needed according to the multidisciplinary team evaluation. During follow-up, two patients needed additional revascularization. The high NPV for DSCT for revascularization assessment indicates that DSCT could be safely used to select patients benefiting from medical therapy only.
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