All of the following conditions are more commonly associated with LBBB pattern than RBBB Pattern on ECG, Except:
Answer is D (Ashman Phenomenon) Ashman Phenomenon is more commonly associated with an RBBB aberration than LBBB. Ashman's phenomenon should be suspected in atrial fibrillation when there is a long cycle followed by a sho cycle, with the subsequent QRS complex manifesting a right bundle branch block pattern. Ashman Phenomenon is more commonly associated with an RBBB aberration than LBBB Ashman's phenomenon is a transient functional bundle brunch block resulting from an aberrant intraventricular conduction abnormality that occurs in response to a change in QRS cycle length (When a sho cycle follows a long one). RBBB aberration is typically more common than LBBB. Ashman's phenomenon should be suspected in atrial fibrillation when there is a long cycle followed by a sho cycle, with the subsequent QRS complex manifesting a right bundle branch block pattern. Acute Myocardial Infarction, Aoic Valve disease and Lev Disease are all associated with LBBB Selected Causes of Left Bundle Branch Block Coronary Hea Disease/ Acute MI (frequently with impaired left ventricular function) Hypeensive Hea Disease Aoic Valve Disease Cardiomyopathy Idiopathic fibrosis of the bundle branch fibres (Lev disease and Lenegre Disease
Acute MI
Aoic valve disease
Lev Disease
Ashman Phenomenon