J Am Coll Cardiol 2018 Nov 06
2018 ACC/AHA/HRS Guideline on theĀ Evaluation and Management of Patients With Bradycardia and Cardiac Conduction Delay: Executive Summary: A Report of the American College of Cardiology/American Heart Association Task Force on Clinical Practice Guidelines, and the Heart Rhythm Society.   

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(Assuming that the patient would require V-pacing almost all the time)