Fascicular Blocks

CARDIOLOGY, ECG

Left Anterior Fascicular Block Left Axis Deviation: Frontal plane axis between −45° and −90°. qR pattern in lead aVL. i.e. Small Q waves with tall R waves in aVL R-peak time in lead aVL of 45 ms or more. i.e. Prolonged R wave peak time in aVL QRS duration less than...

Bundle Branch Block, Right

CARDIOLOGY, ECG

Right Bundle Branch Block Criteria for complete RBBB in adults from the AHA/ACC. QRS ≥ 120 msec (or 110-119 for incomplete BBB) rsr′, rsR′, or rSR′ in leads V1or V2. The R′ or r′ deflection is usually wider than the initial R wave. In a minority of patients, a wide...