Peaked T waves ... or monomorphic S wave, and it appears like a right bundle branch block in leads I and V6 with a broad, slurred S wave. Decreased amplitude of the P waves, an increase in the ...

Hyperkalemia causes peaked T waves initially ... Multifocal atrial tachycardia (MAT) requires three different P wave morphologies in one ECG with a QRS complex rate of > 100.