These radiographs were taken. They show significant changes in the lung field. The lungs normally appear black (because of air), except for the heart and vessels, which appear white. In these x-rays there are more 'white spots' in the lung field, which is likely pulmonary edema. Tumors or any other type of fluid (blood, infection) can give this appearance as well.
This cat needs an echocardiogram (cardiac ultrasound) as soon as possible to determine the diagnosis and hence, prognosis.
One can barely see the cardiac silhouette on the second view. I'll keep you posted.