[ECG changes during radiotherapy of stomach cancer]

Myocardial diffuse dystrophic changes were recorded on the ECG of patients with stomach cancer of different site. After a preoperative course of radiation therapy in the summary focal dose up to 24 Gy these changes were aggravated in 63% of cases: changes in the voltage of the QRS complex waves, amplitudes of P and T waves, S-T intervals and the heart rate were noted. The most pronounced ECG changes developed in patients with tumors in the proximal part of the stomach when radiation exposure of the heart corresponded to 100% of a focal dose. The voltage of the QRS complex waves decreased, the amplitude of P waves increased, a rise of the S-T interval was noted, the amplitude of T waves decreased.