Key result
Patients with congenital heart disease had lower bipolar signal amplitudes during tachycardia than controls (1.01 vs 1.45 mV, P<0.0001), and targeting areas <0.1 mV yielded an 80% ablation success.
Why the study?
Does three-dimensional electroanatomic mapping using a 0.1 mV cut-off identify critical conduction pathways and facilitate successful ablation in patients with congenital heart disease and postoperative atrial tachycardia?
Observational (n=20)
Does three-dimensional electroanatomic mapping using a 0.1 mV cut-off identify critical conduction pathways and facilitate successful ablation in patients with congenital heart disease and postoperative atrial tachycardia?
Absolute Event Rate: 1.01% vs 1.45%
p-value: p=<0.0001
Using a 0.1 mV cut-off for 3D electroanatomic voltage mapping successfully identifies critical conduction pathways for ablation in patients with congenital heart disease and postoperative atrial tachycardia.
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May aid ablation targeting in congenital heart disease atrial tachycardia; hypothesis-generating and requires prospective validation.
Groot et al. (2001) conducted an observational in Congenital heart disease with postoperative atrial tachycardia (n=20). Congenital heart disease with postoperative atrial tachycardia vs. Normal sized atria with atrioventricular reciprocating tachycardia was evaluated on Amplitude of bipolar signals during tachycardia (p=<0.0001). Patients with congenital heart disease had lower bipolar signal amplitudes during tachycardia than controls (1.01 vs 1.45 mV, P<0.0001), and targeting areas <0.1 mV yielded an 80% ablation success.
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