[91] There is little data on specific T- and/or U-wave findings associated with cocaine ... atrial fibrillation and sinus bradycardia). Including studies on neonates, only one study investigating ...

Sinus bradycardia occurs on an ECG when there is a normal upright P wave in lead II ― sinus P wave ― preceding every QRS complex with a ventricular rate of less than 60 beats per minute.

Sinus bradycardia occurs on an ECG when there is a normal upright P wave in lead II (sinus P wave) preceding every QRS complex with a ventricular rate of less than 60 beats per minute. Frequently ...