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[Echocardiography with dobutamine in hypertensive patients with chest pain]
J A Castillo1, I Vilacosta, J A San Román
1Servicio de Cardiología, Hospital Santa María del Rosell, Cartagena, Murcia.
Insights
Dobutamine stress echocardiography offers superior diagnostic accuracy for coronary artery disease in hypertensive patients compared to exercise stress tests. This method demonstrates higher feasibility and specificity, making it a valuable tool for this patient group.
Area of Science:
- Cardiology
- Diagnostic Imaging
- Hypertension Research
Background:
- Exercise stress testing has limitations in accurately diagnosing coronary artery disease (CAD) in hypertensive individuals.
- Dobutamine stress echocardiography presents a valuable alternative for assessing CAD in this population.
Purpose of the Study:
- To compare the diagnostic performance of dobutamine stress echocardiography (DSE) against exercise stress testing (EST) for CAD detection in hypertensive patients.
- To evaluate the feasibility and specificity of DSE in hypertensive patients with suspected CAD.
Main Methods:
- Seventy-four hypertensive patients with chest pain and no prior history of CAD underwent DSE, EST, and coronary arteriography.
- Dobutamine was administered up to 40 micrograms/kg/min, with atropine used as needed during DSE.
Main Results:
- Dobutamine stress echocardiography achieved a higher diagnostic rate (89%) compared to exercise stress testing (65%).
- While both tests showed similar sensitivity (DSE: 79%, EST: 82%), dobutamine stress echocardiography exhibited significantly higher specificity (100% vs. 60%).
- Coronary artery disease was confirmed in a similar proportion of patients completing each test (DSE: 59%, EST: 58%).
Conclusions:
- Dobutamine stress echocardiography is a highly sensitive and specific method for detecting coronary artery disease in hypertensive patients.
- Dobutamine stress echocardiography demonstrates superior feasibility and specificity compared to exercise stress testing in this specific patient cohort.
Introduction:
The exercise stress test shows limited diagnostic accuracy for the detection of coronary artery disease in hypertensive patients. Echocardiography with dobutamine is a useful tool in the assessment of coronary artery disease.
Purpose:
Our purpose has been to compare dobutamine stress echocardiography and exercise stress test for diagnosing coronary disease in hypertensive patients.
Material And Methods:
Dobutamine stress echocardiography (administered up to 40 micrograms/kg/min, and atropine when necessary), exercise stress test and coronary arteriography were performed on 74 hypertensive patients with chest pain and no previous history of coronary artery disease.
Results:
Forty-eight (65%) patients underwent a diagnostic exercise stress test and 66 (89%) a diagnostic dobutamine stress echocardiography. Coronary artery disease (> or = 70% stenosis in, at least, one major vessel) was demonstrated in 28 (58%) patients who underwent a diagnostic exercise stress test, and in 39 (59%) patients who completed a dobutamine stress echocardiography. Sensitivity for exercise stress test was 82%, and 79% for dobutamine stress echocardiography (p = NS). Specificity was higher for dobutamine stress echocardiography (100% vs 60%; p < 0.005).
Conclusions:
Dobutamine stress echocardiography has high sensitivity and specificity for the detection of coronary artery disease in hypertensive patients. Dobutamine stress echocardiography has higher feasibility and specificity than exercise stress test in this group of patients.