PMC3205785_01
A) 97-year-old female with Syncope, initial ECG. (B) A 97-year old female with syncope: heart block resolved within 24 h.
hi-2011-2-e12-g001.jpg
PMC3205785_01_hi-2011-2-e12-g001.jpg
F1
Echocardiogram (ECG) showed sinus arrest and ventricular escape rhythm at a rate of 30 beats per minute with left axis deviation (Figure 1A). Serum potassium subsequently decreased to 3.8 mEq/L within a 24 h period and the ECG showed normal sinus rhythm at a rate of 68 with no signs of heart block (Figure 1B).
PMC3205785_02
PMC3205785_03
(A) 70-year old male with complete heart block. (B) A 70-year old male after resolution of heart block following treatment.
hi-2011-2-e12-g002.jpg
PMC3205785_03_hi-2011-2-e12-g002.jpg
F2
ECG revealed sinus arrest with high-grade heart block and a junctional escape rhythm (Figure 2A). Consequently, serum potassium normalized to 4.0 mEq/L within 24 h, and follow-up ECG revealed normal sinus rhythm (Figure 2B) with no signs of a heart block.