I concur with @ harveywj’s advice about looking elsewhere for advice and knowing all the options. One is an SVT nasal spray, pending FDA clearance, Etripamil, also called Cardamyst. It is a calcium channel blocker. Does anyone in the community have any information on this new SVT drug? Fleconaide is another alternative. BTW, Diltiazem is more about rate control rather than rhythm control. I was prescribed Diltiazem for blood pressure and have had no side effects but knew going in that its efficacy was low in preventing SVT episodes.