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 ...

These ECG voltage attenuations are of extracardiac mechanism, and impact the amplitude of QRS complexes, P-waves, and T-waves ... of QRS complexes of all 12 leads, or the 6 limb leads, or only ...