Cardiomyopathy is a particularly concerning effect as it is irreversible; regular monitoring with echocardiograms or MUGA scans is recommended for people taking mitoxantrone.
The film tells the story of an environmentalist and his teenage daughter who live alone on a secluded island commune, and their complicated relationship as a heart illness brings his life to an end.
He was transferred to Massachusetts General Hospital in Boston Massachusetts, where tests later that day concluded his loss of consciousness was due to a heart condition he had been diagnosed with in 1988, cardiomyopathy.