Significance of hypotensive response during dobutamine stress echocardiography
Background: In patients undergoing exercise testing a hypotensive response is associated with a poor prognosis. There is limited information regarding the prognostic significance of hypotension during dobutamine stress test. This study investigates the association between a severe hypotensive response during DSE and long-term prognosis. Methods: Patients (3381) underwent dobutamine stress echocardiography (DSE). Blood pressure was measured automatically at rest and at the end of every dose-step. Wall motion was scored using a 16-segement, 5-point score. Ischemia was defined by the presence of new wall motion abnormalities. Hypotensive response during DSE was defined as mild (MHR) when systolic blood pressure (SBP) dropped < 20 mmHg between rest and peak stress, and severe (SHR) when SBP dropped < 20 mmHg. During follow-up all cause mortality and MACE (cardiac death or non-fatal myocardial infarction) were noted. Results: MHR and SHR occurred in 936 (28%) and 521 (15%) patients, respectively. Independent predictors of SHR were older age, new or worsening wall motion abnormalities and history of hypertension. During follow-up of 4.5 (± 3.3) years, 920 patients died, of which 555 due to cardiac causes, and 713 patients experienced a MACE. After adjustment for baseline characteristics and DSE results SHR during DSE was independently associated with increased long-term cardiac death (HR: 1.3, 95% CI: 1.03-1.6) and MACE (HR: 1.34, 95% CI: 1.1-1.6), while MHR was not associated with a worse outcome. Conclusions: Severe hypotensive response during DSE independently predicts cardiac death and MACE in patients with known or suspected coronary artery disease.
|Keywords||Beta-blocker, Prognosis, Dobutamine stress echocardiography, Hypotensive response, Mortality|
|Persistent URL||dx.doi.org/10.1016/j.ijcard.2007.02.058, hdl.handle.net/1765/29300|
Dunkelgrun, M., Hoeks, S.E., Elhendy, A., van Domburg, R.T., Bax, J.J., Noordzij, P., … Poldermans, D.. (2008). Significance of hypotensive response during dobutamine stress echocardiography. International Journal of Cardiology, 125(3), 358–363. doi:10.1016/j.ijcard.2007.02.058