the study showed that the binding sites of 11c-labeled methiodide quinuclidinyl benzilate [ ( 11c ] -mqnb ) , a muscarinic antagonist , were mainly distributed in the ventricular septum ( 98 pmol/cm3 of heart ) and in the left ventricular wall ( 89 pmol/cm3 ) , while the atria were not visualized .
C0225870
ventricular septum
C0018787
heart