Medical and surgical treatment of sustained and recurrent post-infarction ventricular tachycardia.

Over a five-year period 57 patients (pts) with sustained, recurrent, post-infarction ventricular tachycardia (VT) refractory to conventional antiarrhythmic treatment were evaluated. In 28 (49%) pts VT was controlled by amiodarone (A) in a dose of 3000 mg week-1. During long-term follow-up 5/28 (18%) pts died; no severe side-effects were observed with this dosage. In 17 of the 29 pts not controlled by this regimen, the dosage of A was increased to 6000-8000 mg week-1; short-term control of VT was achieved in 9/17 (53%) pts, but over a long-term follow-up 5/9 (56%) died and severe side-effects (11% pulmonary fibrosis and 11% hepatitis) occurred in 22%. Twenty pts, resistant to a low (12 pts) or high (8 pts) doses of A, underwent map-guided surgical treatment. In conclusion A is superior to conventional drugs in the treatment of sustained, recurrent, post-infarction VT, but when high doses are necessary to prevent VT, long-term results are poor and severe side-effects frequent. In pts refractory to standard doses of A, map-guided surgery is the treatment of choice.