Complex sentence: He is subdued through the combined efforts of Batman and Talia al Ghul and is taken to Arkham Asylum where withdraw from the Mutagen is causing his body to slowly fall apart, regardless Arkham's staff refuse to treat him because of the personal risk to their health.
Split into simpler sentences: He is subdued through the combined efforts of Batman and Talia al Ghul and is taken to Arkham Asylum where withdraw from the Mutagen is causing his body to slowly fall apart. Regardless, Arkham's staff refuse to treat him because of the personal risk to their health.