After the resting strain measurement is done, you will have the first set of nuclear images. This will be done just like the echocardiography strain measurement. Once these images are completed, you will be given regadenoson by vein over about 10 seconds. Within 2 to 4 minutes of receiving the regadenoson, measurements will be repeated. These measurements will take about 2 minutes to complete. At about 30 minutes after regadenoson was given, you will have the final images for the nuclear portion of the testing (this is the usual timing for nuclear images after regadenoson).