Transient Left Bundle Branch Block due to Severe Hyperkalemia


Hyperkalemia is a potentially life-threatening electrolyte imbalance that can lead to sudden death from cardiac arrhythmias and asystole. We present a case of transient left bundle branch block pattern on an electrocardiogram (ECG) secondary to hyperkalemia in a patient with history of end-stage renal disease. A 52-year-old man presented to the emergency room (ER) with chief complaints of weakness and lethargy after missing his regularly scheduled session of hemodialysis. A 12-lead ECG in the ER showed sinus tachycardia at 118 beats/min, wide QRS complexes, peaked T waves and left bundle branch block-like pattern. The initial basic metabolic panel revealed a serum potassium level of 8.8 mEq/L. Subsequently, the patient underwent emergent hemodialysis. Serum chemistry after hemodialysis showed improvement in serum potassium to 4.3 mEq/L. Repeat ECG performed after correcting potassium showed dissolution of left bundle branch block finding.

DOI: 10.14740/cr538w

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@inproceedings{Kumar2017TransientLB, title={Transient Left Bundle Branch Block due to Severe Hyperkalemia}, author={K. Eswar Kumar and Madhavi Biyyam and Amandeep Singh and Bharat Bajantri and Hassan Tariq and Suresh Kumar Nayudu and Sridhar S. Chilimuri}, booktitle={Cardiology research}, year={2017} }