What does "partial ST-T change in sinus rhythm" mean?

　　Sinus rhythm with partial ST-T changes is a description used in electrocardiogram (ECG) examinations, typically indicating a normal heart rate but with partial abnormalities in the ST segment and T wave.

　　Sinus rhythm is the normal cardiac rhythm, indicating that the heart's pacemaker is the sinoatrial node, which generates electrical impulses automatically and rhythmically. Under normal circumstances, the heartbeat is controlled by the sinoatrial node, so sinus rhythm represents a normal physiological state. ST-T changes refer to abnormalities in the morphology, amplitude, or position of the ST segment and T wave on the ECG. The ST segment represents the phase of slow ventricular repolarization, while the T wave represents the phase of rapid ventricular repolarization.

　　Sinus rhythm with partial ST-T changes usually indicates a normal heart rate but partial abnormalities in the ST segment and T wave. These changes may suggest underlying conditions such as myocardial ischemia, myocardial injury, or electrolyte disturbances. Additionally, sinus rhythm with partial ST-T changes may also be related to drug effects, neurological disorders, and other factors.

　　When sinus rhythm with partial ST-T changes is identified, it is insufficient to make a definitive diagnosis of a specific disease based solely on this finding. Comprehensive evaluation integrating the patient's clinical symptoms, medical history, and other diagnostic results is necessary. In daily life, patients should also maintain healthy lifestyle habits, such as balanced nutrition, appropriate physical activity, and avoiding excessive fatigue, to promote cardiac health.