Key result
Intracardiac three-dimensional echocardiography was useful for guiding successful catheter ablation of idiopathic ventricular tachycardia originating from the left ventricular posterior papillary muscle.
Case Report
Intracardiac three-dimensional echocardiography may be useful for guiding catheter ablation of idiopathic ventricular tachycardia originating from complex structures like the left ventricular posterior papillary muscle.
Hypothesis-generating for 3D echo guidance in papillary muscle VT; larger studies needed before adoption.
Idiopathic ventricular tachycardias (VTs) may originate from several sites in the left ventricle (LV).1,2 It was shown recently that the LV papillary muscles (PMs) can give rise to ventricular arrhythmias (VAs) in patients without structural heart disease, and radiofrequency (RF) catheter ablation can cure these VAs.3–5 However, the PMs are complex structures, and VAs originating from them can be difficult to ablate. Previous studies reported that various cardiac imaging modalities, such as intracardiac echocardiography6 and cardiac magnetic resonance (CMR) imaging, were useful for detecting the origin of idiopathic VTs.
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Kawakami et al. (2015) conducted a case report in Idiopathic ventricular tachycardia. Catheter ablation with intracardiac three-dimensional echocardiography was evaluated. Intracardiac three-dimensional echocardiography was useful for guiding successful catheter ablation of idiopathic ventricular tachycardia originating from the left ventricular posterior papillary muscle.
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