A better understanding of the mechanisms underlying ventricular arrhythmias, as well as an improvement of the associated electrical and pharmacological therapies, are a key factor to prevent sudden cardiac death in patients with structural and electrical heart diseases. An important cardiomyopathy that can lead to life-threatening ventricular arrhythmias is heart failure (HF). Patients with HF also often suffer from left bundle branch block (LBBB), which worsens their condition. Currently, the most effective treatment to these patients is cardiac resynchronization therapy (CRT). However, many patients are non-responders, so further studies are needed to improve this treatment.
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