Key result
Two ventricular sensing electrodes differentiated normal from abnormal rhythms, with 14 of 15 ectopic morphologies showing >20 ms difference in timing compared to normal sinus rhythm.
Why the study?
Does the use of two ventricular sensing electrodes differentiate normal sinus rhythm from ventricular tachycardia and premature ventricular contractions in patients undergoing device implantation or electrophysiology study?
Population
8 patients undergoing dual chamber pacemaker implantation, cardioverter-defibrillator implantation, or…
Comparison
Simultaneous recordings from two ventricular… vs Normal sinus rhythm beats compared to ectopic…
Design
Case_series
Authors
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May support dual ventricular sensing for device rhythm discrimination; hypothesis-generating and requires prospective validation before clinical use.
Observational (n=8)
Does the use of two ventricular sensing electrodes differentiate normal sinus rhythm from ventricular tachycardia and premature ventricular contractions in patients undergoing device implantation or electrophysiology study?
Simultaneous recordings from two ventricular sensing electrodes can effectively differentiate normal sinus rhythm from ventricular tachyarrhythmias based on activation sequence and timing, offering a potential discrimination method for implantable antitachycardia devices.
Mercando et al. (1986) conducted an observational in Arrhythmias (n=8). Two ventricular sensing electrodes vs. Normal sinus rhythm was evaluated on Intervals between the intrinsic deflection of the two ventricular electrograms and difference in sequence and timing. Two ventricular sensing electrodes differentiated normal from abnormal rhythms, with 14 of 15 ectopic morphologies showing >20 ms difference in timing compared to normal sinus rhythm.
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