Key result
Ablation of pseudosinus tachycardias originating from the left pulmonary veins successfully restored sinus rhythm and improved LV systolic function in a patient with tachycardia-induced cardiomyopathy.
Why the study?
Does ablation of pseudosinus tachycardia originating from left pulmonary veins improve LV systolic function in a patient with LV dysfunction?
Case Report (n=1)
Does ablation of pseudosinus tachycardia originating from left pulmonary veins improve LV systolic function in a patient with LV dysfunction?
Ablation of pseudosinus tachycardia originating from the left pulmonary veins can lead to resumption of sinus rhythm and improvement in LV systolic function, suggesting a mechanism of tachycardia-induced cardiomyopathy.
Hypothesis-generating for ablation in tachycardia-induced cardiomyopathy from left pulmonary vein sources; prospective studies needed before clinical adoption.
The case of a 55-year-old man with LV dysfunction in whom the baseline cardiac rhythm falsely mimicked a sinus rhythm (SR) but actually originated from the left superior and inferior pulmonary vein (PV) is reported. The P waves before ablation were flat in leads I and V1, negative in lead aVL, and positive in leads II, III, aVF. After the left superior PV was isolated from the left atrium, another ectopic rhythm newly appeared from the left inferior PV. Interestingly, the LV systolic function improved after the resumption of the SR, thus suggesting that tachycardia-induced cardiomyopathy might be involved in the mechanism of LV systolic disturbance.
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Matsuo et al. (2006) conducted a case report in Pseudosinus tachycardia and LV dysfunction (n=1). Catheter ablation (pulmonary vein isolation) was evaluated on Resumption of sinus rhythm and improvement in LV systolic function. Ablation of pseudosinus tachycardias originating from the left pulmonary veins successfully restored sinus rhythm and improved LV systolic function in a patient with tachycardia-induced cardiomyopathy.
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