I don't know of an increased risk of sudden death after the Batista procedure, but the potential to cause arrhythmias exists since the left ventricular myocardium is manipulated during the procedure. Presently, there is a device called an implantable defibrillator that continuously records the heart rhythm and delivers an internal shock if a lethal arrhythmia develops. The SCUD-HFT trial is evaluating the relative merits of amiodarone compared with defibrillators in a randomized fashion. Thus, you should have further discussions with your own cardiologist to determine what the most appropriate course of action is for you presently. I hope you find this information useful.
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