[ATP radionuclide ventriculography; its usefulness for the evaluation of ischemic heart disease]

To evaluate the usefulness for the detection of ischemic heart disease (IHD), ATP first pass radionuclide ventriculography (RVG) was performed in 10 patients. Coronary angiography was performed in all patients. Among these patients, 2 had single vessel disease, 2 had double vessel disease, 3 had triple vessel disease, and 3 had normal coronary arteries. RVG was performed at rest, then, ATP was infused at the rate of 0.16 mg/kg/min and ATP-RVG was done 4 minutes later. The left ventricular ejection fraction (LVEF) was calculated, and the regional wall motion (RWM) was graded as normal, hypokinesis, akinesis, and dyskinesis. In the patients with coronary artery disease, RWM decreased in 5 of 7 patients and LVEF decreased in 6 of 7 patients by ATP. However, RWM and LVEF did not decrease in the patients with normal coronary arteries. These results suggested that ATP-RVG might provide useful information for the evaluation of IHD.