[Significance of stress echocardiography in patients with angiographically intact coronary arteries].
With the aim of assessment of the significance of stress echocardiography in patients with unchanged coronary arteries we analyzed data from 75 patients in whom coronary angiography (CAG) detected no hemodynamically significant narrowing of coronary arteries. In 38 patients coronary syndrome X (CSX) was revealed. In the group of patients with CSX transient disturbances of local contractility were significantly more frequently observed compared with patients without CSX (52% compared with 21%, respectively). Number of patients with discrepancy between ECG and EchoCG results of a test concerning achievement of criteria of transient myocardial ischemia was also greater in the group of patients with CSX. At CAG cases of retention of contrast medium in the coronary bed were 2 times more frequently observed in the group of patients with CSX (29%) compared with those without CSX (13%) while hemodynamically insignificant stenoses of coronary arteries in this group were found to be less frequent (2.6% compared with 24%, respectively). Thus persons without hemodynamically significant stenoses in the coronary bed appear to be highly heterogeneous group comprising patients with CSX and vasospastic angina as well as patients with peculiarities of structure of coronary bed and with hemodynamically insignificant stenoses in coronary arteries. Among patients with angiographically unchanged coronary arteries without CSX in 69% of cases peculiarities of structure of coronary bed or hemodynamically insignificant stenoses of coronary arteries has been found. Low sensitivity of transient disturbances of local contractility in patients with CSX (52%) does not allow to consider stress-echoCG as a method of effective diagnosis of CSX.
Rustamova
Ia K
IaK
Alekhin
M N
MN
Sal'nikov
D V
DV
Sidorenko
B A
BA
Azizov
V A
VA
D017023:Coronary Angiography / Q000379:methods*; D003331:Coronary Vessels / Q000000981:diagnostic imaging* / Q000503:physiopathology; D003937:Diagnosis, Differential; D025401:Echocardiography, Stress / Q000379:methods*; D005260:Female; D006801:Humans; D008297:Male; D017566:Microvascular Angina / Q000000981:diagnostic imaging* / Q000503:physiopathology; D008875:Middle Aged; D015203:Reproducibility of Results; D012189:Retrospective Studies