Open AccessRadionuclide ventriculography: A noninvasive method for the detection and quantification of left‐to‐right shunts in atrial septal defect
Author(s) -
Kress P.,
Bitter F.,
Stauch M.,
Garvie N.,
Nechwatal W.,
Sigel H.,
Adam W. E.
Publication year - 1982
Publication title -
clinical cardiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.263
H-Index - 72
eISSN - 1932-8737
pISSN - 0160-9289
DOI - 10.1002/clc.4960050301
Subject(s) - medicine , shunt (medical) , cardiology , radionuclide ventriculography , nuclear medicine , technetium , right to left shunt , ejection fraction , radiology , heart failure , patent foramen ovale , migraine
The present investigation was undertaken to assess a new scintigraphic method for the diagnosis of left‐to‐right shunts due to atrial septal defect based on the differing stroke volumes of left and right ventricles and to compare it with oxymetric data. Radionuclide ventriculography was carried out after injection of 20 mCi 99m technetium‐labeled red blood cells. Time‐activity curves were obtained from the left and right ventricular regions, and the ratio (A) of end‐diastolic‐end‐systolic count rate differences for the left and right ventricles was calculated. The left‐to‐right shunt (in percent of the‐pulmonary flow rate) is then given as 100 × (1 – A/1.43); 1.43 being the previously determined mean value of A in 66 normal patients. In 16 patients with an atrial septal defect and/or partial anomalous pulmonary venous connection a correlation of r = 0.81 was found between those shunts determined by the scintigraphic method and those calculated by oxymetric data. The specificity of the method and the sensitivity in detecting left‐to‐right shunts exceeding 30% are high. The method is practical and already widely used for determination of ejection fraction, end‐diastolic volume and other factors. The combination of this technique with other methods for shunt diagnosis such as gamma‐fit analysis may prove of special value.