Note that left atrial enlargement is not able to be diagnosed in the presence of atrial fibrillation because this rhythm is defined by erratic atrial activity and no visible P wave on the ECG.

If no P waves can be seen and the QRS complexes ... Hypokalemia causes U waves in the ECG seen as a positive wave just after the T wave. Hyperkalemia causes peaked T waves initially, then an ...

A new study shows that SCD is linked to prolonged P-wave duration, even in individuals with no coincident cardiovascular ... avoided using electrocardiogram (ECG) for early detection of prolonged ...

There is no associated P wave, although an independent normal P ... sinus depolarization would suppress it 2,3. Figure 2: An ECG obtained from a beagle dog 21 days later, showing six rhythm ...