As previously described with high RV pacing burden, 3 we also observed a nonsignificant trend toward LV and RV functional decline and a significant increase in moderate-to-severe mitral valve regurgitation (n = 6 [19%] vs 27 [90%]; P < .001).
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Indication and electrical performance of conventional, resynchronization, and conduction system pacing in transthyretin amyloid cardiomyopathy.
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