Cardiology Research, ISSN 1923-2829 print, 1923-2837 online, Open Access
Article copyright, the authors; Journal compilation copyright, Cardiol Res and Elmer Press Inc
Journal website https://www.cardiologyres.org

Case Report

Volume 8, Number 2, April 2017, pages 77-80

Transient Left Bundle Branch Block due to Severe Hyperkalemia

Figures

Figure 1.
Figure 1. Electrocardiogram showed left bundle branch pattern, along with tall T waves and wide QRS complex.
Figure 2.
Figure 2. Electrocardiogram after the correction of hyperkalemia.

Table

Table 1. Electrocardiographic Manifestations of Serum Hyperkalemia Relative to Serum Potassium Level [14]
 
Mild hyperkalemia (5.5 - 6.5 mEq/L)Tall, tent-shaped (“peaked”) T waves with narrow base, best seen in precordial leads
Moderate hyperkalemia (6.5 - 8.0 mEq/L)Peaked T waves, prolonged PR interval, decreased amplitude of P waves, widening of QRS complex
Severe hyperkalemia (> 8.0 mEq/L)Absence of P wave, intraventricular blocks, fascicular blocks, bundle branch blocks, QRS axis shift, progressive widening of the QRS complex resulting in bizarre QRS morphology, Eventual “sine-wave” pattern (sinoventricular rhythm), VF, asystole