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Pacing Atrioventricular Block
- Atrioventricular (AV) block is classically treated with restoration of heart rate via right ventricular pacing, however high rates of right ventricular pacing is associated w/ left ventricular systolic dysfunction
- A recent multi-center randomized control trial (RCT) assessed the efficacy of right vs biventricular pacing in heart failure w/ AV block [BLOCK HF Trial]
- Primary outcomes of: morbidity, mortality, and adverse left ventricular remodeling were shown to be significantly lower in biventricular vs right ventricular pacing
- In patients with a high rate of pacing and/or an abnormally low left ventricular ejection fraction biventricular pacing may be more advantageous than conventional right ventricular pacing
References
Curtis A.B., Worley S.J., Adamson P.B.,et al: Biventricular pacing for atrioventricular block and systolic dysfunction. N Engl J Med 2013; 368: 1585-1593