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Kusumoto et al 2018 Bradycardia Clinical Practice Guidelines Circulation. 2019;140:e382–e482. DOI: 10.1161/CIR.0000000000000628 August 20, 2019 e423 CLINICAL STATEMENTS AND GUIDELINES Figure 7. Management of bradycardia or pauses attributable to chronic atrioventricular block algorithm. Colors correspond to Class of Recommendation in Table 2. Refer to Section 6.4. for discussion. *Symptoms correlate with AV block. †PR interval >240 ms, LBBB. ‡PR interval >240 ms, QRS >120 ms or fascicular block. §Refer to heart failure guidelines.S6.4-1,S6.4-2 AV indicates atrioventricular; GDMT, guideline-directed management and therapy; HF, heart failure; LBBB, left bundle branch block; and LVEF, left ventricular ejection fraction. Downloaded from http://ahajournals.org by on October 7, 2026