This paper presents the effect of ozone on the electrocardiogram. The electrocardiogram (ECG) is a test that records the electrical activity produced by the heart. The ECG can pick up abnormalities of heart rhythm and can give us information on whether the heart is enlarged or working under strain. Ozone thus plays a key role in the temperature structure of the Earth__ampersandsign#39;s atmosphere. We record the ECG of__ampersandsignnbsp;human being at normal conditions. After that person is seating inside the chamber. The temperature inside the chamber can be increased by heating lamp. Then long breathing can be carried out for ten minutes at higher temperature. Again record the ECG__ampersandsignlsquo;S at higher temperatures. It is found that the Heart Rate becomes increases in higher temperatures.