PMC5314670_01
Atrial arrhythmias during vasodilator stress. Electrocardiogram tracings obtained at baseline (panel a), during atrial flutter (b), and fast atrial fibrillation (2 min after aminophylline, c). Left bundle branch block morphology with no R-wave progression through chest leads denoted counterclockwise rotation of the heart in horizontal plane
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PMC5314670_01_WJNM-16-75-g001.jpg
F1
After dipyridamole infusion (0.56 mg/kg), the patient installed tachycardia-dependent left bundle branch block followed by atrial flutter at 175 bpm (A) and atrial fibrillation 2 min after aminophylline administration [Figure 1].
Scintigraphic "D-shaped" sign. (a) "D-shaped" left ventricle morphology (dotted-line contour) with flattening and stretching of interventricular septum (white arrows) and slightly decreased septal uptake. (b) No perfusion defects
WJNM-16-75-g002.jpg
PMC5314670_01_WJNM-16-75-g002.jpg
F2
LV [Figure 2]. LV perfusion was normal.