EKG, sinus rhythm? Does that mean the heart's okay?

Sinus rhythm on ECG does not mean that the heart is normal.

Sinus rhythm on ECG means that the heart is normally controlling heart rate through sinus node. Sinus rhythm results alone cannot completely determine that there is no problem in the heart, because ECG is only a measurement and recording of cardiac electrical activity, which can reflect some common heart problems, such as arrhythmia, myocardial ischemia, etc., but if the patient's heart is less affected, ECG may not be significantly abnormal

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