For example, abnormalities in how the SA node works, electrolyte imbalance, ... Sinus arrhythmia is normally diagnosed using an electrocardiogram, which records the heart's electrical activity.

If there is sinus rhythm, and the heart rate is greater than 100 bpm, then sinus tachycardia is present. The links below take you to examples of each of these. Sinus Bradycardia ECG Example ...

The second page of the tool (Appendix, page i8) displays several examples of uncommon ECG patterns. Classifying ECGs as normal or abnormal. The goal of ECG interpretation in athletes is to ... sinus ...