A P wave occurs before each QRS complex (+) with a stable PR interval (0.14 sec). The P wave is positive in leads I, II, aVF, and V4-V6. This is a sinus tachycardia. The P waves are negative in ...
Objective: Precordial ECGs reveal significant intrasubject variability due to the inexact employment of the recommended V 1-V 6 chest landmarks ... whether the 12-lead ECG could be substituted ...
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