A. An example of midcavitary catheter position for left ventriculography using a pigtail
catheter: before the injection of contrast (A-1), at end-diastole (A-2), and at end-systole
B. Left ventricular inflow tract catheter position for right anterior oblique using a pigtail
catheter: before the introduction of contrast (B-1), at end-diastole (B-2), and at end-
Figure 3-11. Cardiac catheterization with the injection of contrast during
diastole and systole.