I spoke with the researchers on this particular study a few months ago at a local conference. This study is interesting to me due to a few factors:

• Ibogaine is almost never studied in the medical context because a small number of individuals experience an adverse reaction involving the heart which can result in death
• The researchers theorized you could counter this rare but life threatening side effect by co-administering magnesium, suggesting that afib is behind the heart-related problems and that ibogaine may cause some kind of imbalance with Ca, K, and Na.
• Ibogaine is a schedule 1 controlled drug in the US meaning that it cannot be studied for medical purposes. Unlike MDMA and psilocybin which have had the power of MAPS arguing for decades for the use in research and allowing medical research despite the scheduling status of the drugs, ibogaine has not received this special status, meaning that the researchers had to have a rather unique study design in which patients were recruited in one country and sent to another country for treatment. I've quite literally never seen a study do this, let alone one which is working with a population that is federal in nature (veterans) and is a fantastically creative way of ensuring medical research can continue amongst draconian law.

Also, here's a direct link to the article in nature