Left bundle branch block and changing axis deviation during acute myocardial infarction

Acute myocardial infarction and left bundle branch block with changing axis deviation

“…Changing axis deviation has been reported [1][2][3][4][5][6] also during atrial fibrillation [7][8][9]or atrial flutter [10,11].Changing axis deviation has been also reported during acute myocardial infarction [12][13][14][15][16][17][18][19][20][21][22] associated with atrial fibrillation too [23,24] or at the end of atrial fibrillation during acute myocardial infarction [25]. Left bundle branch block is usually associated with normal or left axis deviation [26].…”

Right bundle branch block with changing axis at the end of atrial fibrillation

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Changing axis has been reported [1][2][3][4][5][6][7][8] also during atrial fibrillation [9][10][11] or atrial flutter [12,13]. Changing axis has been also reported during acute myocardial infarction [14-25] associated with atrial fibrillation too [26,27] or at the end of atrial fibrillation [28,29], also during acute myocardial infarction [30,31].

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Left bundle branch block with changing axis deviation

“…A left bundle branch block is usually associated with normal or left axis deviation [31]. Rarely the ECG shows a left bundle branch block with changing QRS morphology [4] and changing axis deviation [7,8,24,25,31]. There are several possible explanations for the intermittent shift in the QRS axis in the presence of a complete left bundle branch block.…”