Circulation. Arrhythmia and electrophysiology, Volume 15, Issue 1, 23 4 2021, Pages e009886 Ultrasound-Guided Optogenetic Gene Delivery for Shock-Free Ventricular Rhythm Restoration. Nyns ECA, Jin T, Bart CI, Bax WH, Zhang G, Poelma RH, de Vries AAF, Pijnappels DA