Key result
Premature extrastimulation in the human right atrium significantly increased local stimulus response latency from 3.8 ms to 27.9 ms at 5 ms proximity (P<0.0001), without changing propagation time.
Why the study?
Does premature extrastimulation increase local stimulus response latency or impulse propagation time in the human right atrium?
Observational (n=19)
Does premature extrastimulation increase local stimulus response latency or impulse propagation time in the human right atrium?
Absolute Event Rate: 27.9% vs 3.8%
p-value: p=<0.0001
Prolongation of conduction time during premature atrial stimulation is primarily caused by local stimulus response latency rather than true propagation delay.
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Local latency, not propagation delay, explains premature atrial slowing; leaves open refined mapping for arrhythmia mechanisms.
Koller et al. (1995) conducted an observational in Patients undergoing programmed electrical stimulation (n=19). Premature extrastimulation vs. Basic stimulation was evaluated on Local stimulus response latency (p=<0.0001). Premature extrastimulation in the human right atrium significantly increased local stimulus response latency from 3.8 ms to 27.9 ms at 5 ms proximity (P<0.0001), without changing propagation time.
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