Dr A Röschl's picture

Many people are considerably unsettled by ECG recordings from smart watches. However, smartwatch ECGs can be helpful in the diagnosis of paroxysmal atrial fibrillation. Here. you can see an example. It is a 1-channel ECG that corresponds to lead I. Initially there is an irregular fast pulse without P waves, which corresponds to a tachyarrhythmia in atrial fibrillation. At the end of the first line, after a very short pause, there is sinus rhythm. In the third line you see a short SVT over 3 beats, then SR again. The QRS complex is widened to over 120 ms. There is either an RBBB or an unspecific intraventricular conduction disturbance, certainly not a LBBB.

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