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J Am Board Fam Med ; 31(2): 219-225, 2018.
Article in English | MEDLINE | ID: mdl-29535238

ABSTRACT

OBJECTIVE: To determine whether admission, and provocative stress testing of patients who have ruled out for acute coronary syndrome put patients with low-risk category for coronary artery disease (CAD) at risk for false-positive provocative stress testing and unnecessary coronary angiogram/imaging. METHODS: A retrospective chart review was performed on patients between 30 and 70 years old, with no pre-existing diagnosis of CAD, admitted to observation or inpatient status chest pain or related complaints. Included patients were categorized based on Duke Clinical Score for pretest probability for CAD into either low-risk group, or moderate/high-risk group. The inpatient course was compared including whether provocative stress testing was performed; results of stress testing; whether patients underwent further coronary imaging; and what the results of the further imaging showed. RESULTS: 543 patients were eligible: 305 low pretest probability, and 238 moderate/high pretest probability. No difference was found in rate of stress testing relative risk (RR) = 1.01 (95% CI, 0.852 to 1.192; P = 0); rate of positive or equivocal stress tests between the 2 groups: RR = 0.653 (95% CI, 0.415 to 1.028; P = .07,). Low-pretest-probability patients had a lower likelihood of positive coronary imaging after stress test, RR = 0.061 (95% CI, 0.004 to 0.957; P = .001). CONCLUSION: Follow-up provocative testing of all patients admitted/observed after emergency department presentation with chest pain is unlikely to find CAD in patients with low pretest probability. Testing all low-probability patients puts them at increased risk for unnecessary invasive confirmatory testing. Further prospective testing is needed to confirm these retrospective results.


Subject(s)
Acute Coronary Syndrome/diagnosis , Chest Pain/diagnosis , Coronary Artery Disease/diagnosis , Exercise Test/statistics & numerical data , Acute Coronary Syndrome/complications , Adult , Aged , Chest Pain/etiology , Clinical Decision-Making , Coronary Angiography/standards , Coronary Angiography/statistics & numerical data , Coronary Artery Disease/complications , Diagnosis, Differential , Emergency Service, Hospital/standards , Emergency Service, Hospital/statistics & numerical data , Exercise Test/standards , False Positive Reactions , Female , Hospitalization/statistics & numerical data , Humans , Male , Middle Aged , Patient Selection , Practice Guidelines as Topic , Retrospective Studies , Risk Assessment/methods , Risk Assessment/statistics & numerical data , Risk Factors
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