Extrait

Hypertrophic Obstructive Cardiomyopathy (HOCM) patients have significant clinical symptoms, including progressively increasing fatigue, angina, exertional dyspnea, and syncope. Conservative medications are used to treat the vast majority of patients. Invasive therapy, which includes surgical myectomy, septal ethanol ablation and dual-chamber pacing is introduced to patients with refractory symptoms or drug resistance. Considering the sternotomy and relatively high patients' tolerance required in myectomy, the potentially risky misplacement of ethanol and the anatomic variability of the vascularised hypertrophic septum, and the potential risk of conduction block after these two treatments, the development of new minimally invasive approach is warranted. Previous researches have illustrated the effectiveness and feasibility of transcatheter radio frequency ablation for HOCM patients. By far, there has been no report on transthoracic laser-induced interstitial thermotherapy (LITT) for human treatment. Since 2004, our department has adopted High Intensity Focused Ultrasound, radio frequency and laser in solid tumors treatment, including liver tumors and fibroid. Also our center has conducted several animal experiments to verify the feasibility of radio frequency/laser in septal myocardium ablation. The purpose of this study is to lead echocardiography-guided transthoracic radio frequency/laser ablation for HOCM ventricular septum, make minimally invasive treatment plans for HOCM patients, and verify the safety and validity of intervention treatment in long term.

Critère d'inclusion

• Hypertrophic Obstructive Cardiomyopathy

Liens

• nct