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The atrial rate is indicated by the frequency of the P waves. The ventricular rate is indicated by the frequency of the QRS complexes. In the absence of disease, the atrial rate should be the same ...
If no P waves can be seen and the QRS complexes are irregularly irregular, then atrial fibrillation is present. ST segment elevation from pericarditis is diffuse (all leads except aVR and V1 ...
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