Key result
Increasing catheter contact force significantly increased electrogram complex size only when initial contact force was <10 g (P<0.0005), indicating mapping forces should be ≥10 g to minimize variation.
Why the study?
Does catheter contact force and orientation impact left atrial electrogram characteristics during sinus rhythm and atrial fibrillation mapping?
Does catheter contact force and orientation impact left atrial electrogram characteristics during sinus rhythm and atrial fibrillation mapping?
p-value: p=<0.0005
Mapping contact forces should be maintained at ≥10 g to negate the influence of contact force on left atrial electrogram characteristics.
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May reduce electrogram variability with optimized contact force; leaves open standardized mapping protocols for AF ablation.
Ullah et al. (2015) studied Atrial fibrillation (n=30). Catheter contact force and orientation changes vs. Initial contact force ≥10 g or perpendicular orientation was evaluated on Electrogram complex size (p=<0.0005). Increasing catheter contact force significantly increased electrogram complex size only when initial contact force was <10 g (P<0.0005), indicating mapping forces should be ≥10 g to minimize variation.
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