Correspondence to Dr Jonathan A Drezner, Stadium Sports Medicine Center, University of Washington, Seattle, WA 98195, USA; jdrezner{at}uw.edu The most substantive change is the introduction of a ...

There is clearly a broad QRS complex which is predominantly positive in V1 indicative of RBBB. You can also see an RSR pattern to the QRS complex in V1 reflective of the fact that the left ventricle ...

1 Department of Family Medicine, University of Washington, Seattle, Washington, USA 2 Division of Ciology, University of Washington, Seattle, Washington, USA 3 Division of Ciology, Seattle Children's ...