Value of definitive diagnostic testing in the evaluation of patients presenting to the emergency department with chest pain.
The optimal diagnostic evaluation of patients presenting to the emergency department (ED) with chest pain but without myocardial infarction or unstable angina is controversial. We performed a prospective, nonrandomized, observational study of 1,195 consecutive patients presenting to the ED with chest pain but who had normal or nondiagnostic electrocardiograms and negative cardiac biomarkers. Patients (mean +/- SD age 61 +/- 15 years; 55% women) were admitted to the hospital and a standard protocol for evaluation and treatment was suggested. The use of stress myocardial perfusion imaging (MPI) or cardiac catheterization during their index hospitalization, and the 3-month incidence of coronary angiography, percutaneous cardiac intervention, coronary artery bypass surgery, re-presentation to our institution's ED for chest pain, myocardial infarction, or death were followed. Five hundred nine of 1,195 patients (43%) underwent provocative stress MPI during their index hospitalization; 37% had perfusion defects (predominantly ischemia). Fifty-six of 1,195 patients (4%) underwent cardiac catheterization without stress MPI for their primary diagnostic evaluation. Six hundred thirty of 1,195 patients (53%) had neither MPI or cardiac catheterization during their index hospitalization. During the 3-month follow-up period, patients with a normal stress perfusion study during their index hospitalization had fewer return visits (4%) compared with patients with abnormal perfusion studies (19%), those who underwent catheterization directly (16%), or patients with no initial diagnostic evaluation (15%) (p <0.001). In addition, patients who had a diagnostic evaluation during their index hospitalization had a lower incidence of either acute myocardial infarction (0.9% vs 2.1%) or death (0.4% vs 3.0%, p <0.001) in the 3-month follow-up period. Accordingly, we strongly advocate provocative stress MPI early after presentation for chest pain in all patients with risk factors for coronary artery disease.
Shoyeb
Abu
A
Division of Cardiology, Department of Medicine, College of Physicians & Surgeons, Columbia University, 630 West 168th Street, New York, NY 10032, USA.
Bokhari
Sabahat
S
Sullivan
Jennifer
J
Hurley
Eileen
E
Miesner
Bernadette
B
Pia
Raffaela
R
Giglio
James
J
Sayan
Osman R
OR
Soto
Lucy
L
Chiadika
Simbo
S
LaMarca
Cristina
C
Rabbani
LeRoy E
LE
Bergmann
Steven R
SR
D000367:Age Factors; D000368:Aged; D006328:Cardiac Catheterization; D002637:Chest Pain / Q000175:diagnosis* / Q000453:epidemiology / Q000628:therapy; D003324:Coronary Artery Disease / Q000175:diagnosis / Q000453:epidemiology / Q000628:therapy; D004562:Electrocardiography; D004636:Emergency Service, Hospital / Q000592:standards; D005080:Exercise Test; D005260:Female; D005500:Follow-Up Studies; D006760:Hospitalization; D006801:Humans; D015994:Incidence; D008297:Male; D008875:Middle Aged; D015425:Myocardial Reperfusion; D009518:New York / Q000453:epidemiology; D011446:Prospective Studies; D012307:Risk Factors; D012680:Sensitivity and Specificity; D012737:Sex Factors