The standard ECG has 12 leads. Six of the leads are considered ... The waves on an ECG include the P wave, Q wave, R wave, S wave, T wave and U wave. Interval: The time between two specific ...

but negative QRS in lead I). 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 intraventricular conduction ...

23 Inclusion of such U waves can easily “inflate” the QTc by 80–200 ms and unnecessarily precipitate a diagnosis of LQTS.16 Finally, one must keep in mind that the QTc is not the only finding ...

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