Left bundle branch block (LBBB) masks changes due to hyperkalemia: a myth.

Kumar, Anil; Shah, Neel; Jesmajian, Stephen · J Hosp Med · 2010

case_report · Level V

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Abstract

Left bundle branch block masks ischemic changes but not those due to electrolyte imbalance. Peaking of T waves, prolongation of PR interval, diminution/absence of P wave, and widening of QRS complex can still be appreciated if one carefully compares the baseline ECG to the presenting ECG.

Medical subject headings