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Myocardial perfusion in patients with permanent ventricular pacing and normal coronary arteries

Emmanuel I. Skalidis, MD^*, George E. Kochiadakis, MD^*, Sophia I. Koukouraki, MD, Stavros I. Chrysostomakis, MD^*, Nikolaos E. Igoumenidis, MD^*, Nikolaos S. Karkavitsas, MD and Panos E. Vardas, MD, PhD, FESC, FACC^*

^* Department of Cardiology, University Hospital of Heraklion, Crete, Greece
Department of Nuclear Medicine, University Hospital of Heraklion, Crete, Greece

View larger version (17K): [in a new window]   Figure 1 Mean values with 95% confidence intervals (CIs) of time-averaged peak coronary flow velocity at baseline (r-APV; open squares) and maximal hyperemia (h-APV; solid squares) in the dominant coronary artery in groups I and II (with and without perfusion defects, respectively) and in the control group.

View larger version (13K): [in a new window]   Figure 2 Mean values with 95% confidence intervals (CIs) of coronary flow reserve (CFR) in the dominant coronary artery in groups I and II (with and without perfusion defects, respectively) and in the control group.

View larger version (71K): [in a new window]   Figure 3 Exercise and dipyridamole thallium-201 SPECT stress and rest images from the fifth patient in Table 1, showing a reversible inferior and inferoseptal defect during exercise and a reversible inferior defect with preservation of the inferoseptal region during dipyridamole administration.