This is commonly described as varying RR intervals. This means an ECG showing atrial fibrillation will have no visible P waves and an irregularly irregular QRS complex. The ventricular rate is ...

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 76-year-old woman presents with a persistently rapid heart rate that she attributes to her pacemaker. What does the ECG ...

Multiple other ECG traits have also emerged as potential predictors of stroke, namely cardiac electrical/structural remodeling – Q wave, QRS/QT duration, bundle blocks, P wave duration/amplitude ...

The ECG findings presented as normal in athletes were established ... until there is a non-conducted P wave with no QRS complex (figure 7). The first PR interval after the dropped beat is shorter than ...

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 ...

On ECG, a regular heartbeat starts with a smaller, round P wave as electricity stimulates the atria. The P waves are followed by a period of no activity, or PR interval, before sharp waves of ...

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 ...

Department of Family Medicine, University of Washington, Seattle, Washington, USA Correspondence to Professor Jonathan A Drezner, Department of Family Medicine, University of Washington, P.O. Box ...