Is there any utility in starting quinidine for non-ischemic VT storm refractory to amiodarone, lidocaine?

Unfortunately, there are no data regarding this strategy. In addition, IV quinidine is generally not available in the US. In this clinical scenario, in addition to beta-blockade, my choice might be to try mexiletine, although again, it is only available orally and there are scant data in this regard...