Related Experiment Videos
Nuclear scans: a clinical decision making tool that reduces the need for cardiac catheterization
Insights
Cardiovascular nuclear medicine studies (CVNMS) significantly altered physician decisions for cardiac catheterization in suspected ischemic heart disease patients. Exercise-based CVNMS notably reduced catheterization rates, especially for normal test results.
Area of Science:
- Cardiology
- Nuclear Medicine
- Medical Decision Making
Background:
- Ischemic heart disease diagnosis often requires invasive procedures like cardiac catheterization.
- Cardiovascular nuclear medicine studies (CVNMS) are used to assess patients with suspected ischemic heart disease.
- The impact of CVNMS on physician decisions regarding cardiac catheterization requires further evaluation.
Purpose of the Study:
- To assess the influence of CVNMS on physician decisions for cardiac catheterization in patients with suspected ischemic heart disease.
- To determine if different types of CVNMS (resting vs. exercise) have varying impacts on catheterization referral rates.
- To investigate potential sex-based discrepancies in catheterization referral following CVNMS.
Main Methods:
- Retrospective analysis of 439 patients with suspected ischemic heart disease across three Bronx hospitals.
- Evaluation of changes in management plans concerning cardiac catheterization post-CVNMS.
- Stratification of results based on CVNMS type (resting vs. exercise) and findings (normal vs. abnormal).
Main Results:
- Overall, CVNMS led to a change in catheterization plans in 31% of cases.
- Catheterization rates decreased by 25% for resting studies and 49% for exercise studies.
- Exercise CVNMS with normal results showed an 82% reduction in catheterization, while abnormal results showed a 27% reduction (p<0.001).
- Women with abnormal exercise CVNMS results were significantly less likely to undergo catheterization (7.7%) compared to men (41.9%) (p<0.005).
Conclusions:
- CVNMS, particularly exercise-based studies, can effectively reduce cardiac catheterization rates in patients with suspected ischemic heart disease.
- The impact of CVNMS is more pronounced in patients with normal exercise study results.
- A significant sex-based disparity exists in post-CVNMS catheterization referrals, warranting further investigation.
Abstract:
We have assessed the impact of cardiovascular nuclear medicine studies (CVNMS) on physicians' decisions to send patients with suspected ischemic heart disease (N = 439) on to cardiac catheterization at three Bronx hospitals. A change in management plans with respect to catheterization was observed in 31% of cases. Catheterization rates were reduced by 25% among patients referred for resting studies and by 49% for exercise studies (thallium perfusion or exercise wall motion studies). Results of CVNMS had little impact on catheterization decisions for resting study patients (N = 192). Among exercise study patients (N = 247), those with normal results had a relative reduction in catheterization post-CVNMS of 82% vs 27% for patients with abnormal results (p less than 0.001). However, impact of exercise CVNMS test results on post-CVNMS catheterization rates obtained for men only; women with abnormal exercise study results were much less likely to undergo subsequent catheterization (7.7%) than men with abnormal results (41.9%), p less than 0.005, independent of age. The apparent discrepancy in referral for catheterization based on sex needs to be investigated further.