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What is Wide QRS duration is- and explain in detail?
a wide qrs complex by definiton is more than 120 ms The QRS complex duration is wide (>0.12 seconds or 3 small boxes) in every lead. Causes of a widened QRS complex include right or left BBB, pacemaker, hyperkalemia, ventricular preexcitation as is seen in Wolf-Parkinson-White pattern, and a ventricular rhythm. Ref Harrison 20th edition pg 1576