What has caused this young woman in her 20s to develop heart palpitations and shortness of breath? That's what Xuhong Geng, MD, of Fourth Hospital of Hebei Medical University in China, and colleagues ...
The correct diagnosis is sinus tachycardia, left atrial abnormality, and QRS (electrical) alternans, right axis caused by left posterior fascicular block (Figure 2). The rhythm is regular at a rate of ...
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