Randomized comparison between clinical evaluation plus N-terminal pro-B-type natriuretic peptide versus exercise testing for decision making in acute chest pain of uncertain origin.
BACKGROUND
Exercise testing constitutes the usual tool for decision making in chest pain units. This policy implies logistical constrains. Our aim was to evaluate a new strategy, combining a clinical risk score and N-terminal pro-B-type natriuretic peptide (NT-proBNP), in patients presenting to the emergency department with chest pain, without ischemic electrocardiogram changes or troponin elevation.


METHODS
A total of 320 patients were randomized to either usual management, involving exercise testing, or a new strategy combining a clinical risk score and NT-proBNP without exercise testing. In the usual management, discharge decision was guided by the result of exercise test. In the new strategy, those patients with low clinical risk score and NT-proBNP were directly discharged. The primary outcome was hospitalization at the index episode. Secondary outcomes were cardiac events at 1 year.


RESULTS
A total of 110 patients (69%) were hospitalized using usual management in comparison with 90 (56%) in the new strategy (P = .03). There were no differences in death or myocardial infarction (n = 11, 6.9% vs n = 6, 3.8%, P = .3) or cardiac events (n = 38, 24% vs n = 28, 18%, P = .2). Revascularizations at the index episode were more frequent under usual management (18% vs 8%, P = .01), although the new strategy was associated with higher rate of planned postdischarge revascularizations (0.6% vs 5%, P = .04).


CONCLUSIONS
A strategy combining clinical history and NT-proBNP is simpler and reduced initial emergency hospitalizations in patients with chest pain, in comparison with the usual strategy involving exercise testing. Larger studies to assess its impact on long-term hard end points are needed.
Cardiology Department, University Clinic Hospital, University of Valencia, Blasco Ibáñez 17, València, Spain. sanchis_juafor@gva.es
Juan
J
Sanchis
Xavier
X
Bosch
Vicente
V
Bodí
Julio
J
Núñez
Ada
A
Doltra
Magda
M
Heras
Luis
L
Mainar
Enrique
E
Santas
Ernest
E
Bragulat
Ana
A
García-Alvarez
Arturo
A
Carratalá
Angel
A
Llácer
D000208:Acute Disease; D002637:Chest Pain / Q000097:blood* / Q000175:diagnosis / Q000209:etiology*; D005080:Exercise Test; D005260:Female; D006760:Hospitalization / Q000706:statistics & numerical data; D006801:Humans; D008297:Male; D008875:Middle Aged; D020097:Natriuretic Peptide, Brain / Q000097:blood*; D010351:Patient Discharge; D011446:Prospective Studies
D020097:Natriuretic Peptide, Brain