Bradycardia occurs when a person’s heart rate falls below 60 beats per minute. Sinus bradycardia is one of the more common types and can occur in healthy people or secondary to many people who do not understand the terminology used in ECG test results and are therefore concerned about the severity of the condition. Is it important to have altered t-waves in sinus bradycardia? An electrocardiogram is a common and easy way to detect arrhythmias such as sinus bradycardia. A normal person’s ECG can show both ST segment and T wave. If there are abnormal changes in the T wave that do not yet meet the criteria for ischemia or other pathology, they can be collectively referred to as T wave changes. Patients should improve 24-hour ambulatory ECG, cardiac ultrasound and other related examinations as early as possible, and consider 64-row spiral CT and coronary angiography if necessary to make a clear diagnosis and take scientific treatment measures according to specific conditions if there is myocardial ischemia manifestation. Generally speaking, there is no need to be particularly nervous when sinus bradycardia t-wave changes occur. If the heart rate is still above 50 beats per minute and no significant abnormalities are seen in other related examinations, there is no serious problem and observation can be maintained. If the slow heartbeat is severe and accompanied by organic pathology, there is a certain risk and active therapeutic intervention is needed. Patients with a heart rate below 50 beats per minute should be treated with medication as prescribed by the physician to increase the heart rate based on the treatment of the original disease. If the heart rate is lower than 40 beats per minute, accompanied by sinus arrest, chest tightness, blackness, dizziness and syncope, consider timely installation of a pacemaker to reduce the risk of sudden death. It is known from the above introduction that whether sinus bradycardia t-wave changes are important is related to the degree of slow heart rate, the presence of underlying pathology and other factors, and with the help of further examination, the condition can be fully understood. The milder cases can be left untreated and kept under observation. In more severe cases, it is necessary to take medication under the guidance of a doctor and to install a pacemaker if necessary. Pay attention to a light diet, avoid stimulation, stop smoking and drinking, and ensure rest. Do not overexert yourself, avoid strenuous exercise, maintain emotional stability, review regularly, and do not worry too much and be anxious.