Ischemic Heart Disease Clinical Trial
Official title:
Comparison of Dobutamine Stress Echocardiography and Fractional Flow Reserve in Patients With Moderate Coronary Artery Disease: Stable and Non-culprit Lesions Investigation
Enrollment:
- Patients with stable coronary artery disease (SCAD) and moderate coronary artery
stenoses (30-70 %)
- Patients with acute myocardial infarction and moderate stenosis of non-culprit arteries
(NCL; BYSTANDER LESION)
Aims:
- To assess the diagnostic accuracy of dobutamine stress echocardiography (DSE) and
invasive fractional flow reserve (FFR) measurement
- To assess the prognostic impact of reclassification by a mismatching negative test
Hypothesis:
- DSE and FFR have similar prognostic value in both clinical settings (SCAD and NCL)
- Considering the strong negative predictive value of both DSE and FFR, one negative test
is sufficiently enough to defer revascularisation, even in the case of mismatch
Easy accessibility made fractional flow reserve (FFR) a widely accepted method to evaluate
myocardial ischaemia in patients with moderate coronary artery stenosis, although the
prognostic value for "hard" endpoints such as myocardial infarction and cardiovascular death
is equivocal.
Dobutamine stress echocardiography (DSE) is a useful and safe non-invasive functional test
for myocardial ichaemia evaluation. There are robust data confirming the prognostic value of
DSE regarding the same "hard" endpoints.
In patients with SCAD there are clear recommendations in the recent guidelines both for DSE
guided or FFR guided revascularization but the data about prognosis is limited, especially in
the case of FFR guidance. The outcome is also equivocal if there is a difference between the
invasive and non-invasive test result.
In patients with acute myocardial infarction, more than 50% of patients have multivessel
disease. There are clear recommendations for the management of infarct related artery,
however controversy still exists for the management of angiographically moderate NCLs.
In DSE vs. FFR prospective trial, the Investigators plan to perform both the DSE and FFR
tests in the above mentioned clinical settings, to investigate the correlation between them.
The causes of differences between them would be investigated as well as the prognostic impact
of reclassification by a second test (either DSE or FFR).
If both tests are positive, revascularisation is planned to be performed (PCI Group). In
cases of either double negative or mismatching tests, optimal medical therapy will be chosen
(OMT Group) with clinical follow up of at least 2 years.
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