[The role of transesophageal dopplerographical assessment of coronary reserve in coronary sinus in diagnosis of hemodynamically significant left coronary artery stenoses]
AIM: To assess the role of estimation of coronary reserve in coronary sinus by transesophageal doppler during dipyridamole stress test for diagnosis of hemodynamically significant left coronary artery stenoses. MATERIAL: Patients with angiographically proven left coronary artery stenoses (n=29) and 25 healthy volunteers. METHODS: Coronary reserve was calculated as 1) ratio of peak to basal diastolic coronary flow velocity (V(p)CR), and 2) ratio of volume coronary blood flow velocity before and during hyperemia (VBF CR). Coronary reserve