AngiocardiographySodium Pertechnetate Tc 99mIridiumDextrocardiaRadionuclide GeneratorsTechnetiumRadionuclide AngiographyGated Blood-Pool ImagingVentriculography, First-PassCineangiographyHeart Defects, CongenitalHeart VentriclesHeartCardiac CatheterizationStroke VolumeEchocardiographyCoronary Disease