title: [Alteration of coronary blood flow after injection of a contrast medium (author's transl)].
abstract: The injection of with different, energetic separable radioactive isotope labelled particles in the same coronary artery before and short after the injection of a contrast medium reveals in many cases variable scintigraphic pictures. The temporary vasodilatation caused by the contrast medium produces in presence of a coronary stenosis a disturbance of the regional blood flow. Thereby we find in the poststenotic myocardial area a transient ischemia, bringing about a decrease of the activity at the scintigram. As this transient ischemia is only demonstrable with a hemodynamic effective stenosis, in such cases a good effect of coronary surgery can be expected. On the other hand, in the presence of effective stenoses in all three coronary branches, in the double-scintigram alterations of the perfusion can be missed, showing the same scintigraphic picture as with normal coronary arteries.
mesh_terms: D003287:Contrast Media / Q000494:pharmacology*; D003326:Coronary Circulation / Q000187:drug effects*; D003331:Coronary Vessels / Q000187:drug effects* / Q000503:physiopathology; D006801:Humans; D007511:Ischemia / Q000139:chemically induced; D008297:Male; D008863:Microspheres; D008875:Middle Aged; D011877:Radionuclide Imaging; D012711:Serum Albumin, Radio-Iodinated; D013667:Technetium; D014665:Vasodilator Agents
chemical_list: D003287:Contrast Media; D012711:Serum Albumin, Radio-Iodinated; D014665:Vasodilator Agents; D013667:Technetium
vernacular_title: Regionale Myokardperfusionsänderungen infolge Kontrastmittelinjektion