Only 1 person in all the trials exhibited heart problems. Though this may indicate what could occur in a larger treated population, or what could occur if healthy individuals are mistakenly treated with the drug, it is not an indictment of the drug itself. Not yet. Heart problems can go unseen for decades and strike out of the blue in otherwise healthy individuals. I agree with others that caution is needed in proceeding, but cannot condemn the drug, the company, or the testing facility without more information about the man's death (and I'm usually all for holding pharma accountable).
Also, this was voluntary. To clear his debts means he signed up for the cash, voluntarily. It was still his choice to pay his bills this way. Though there is some question as to the ethics of offering money to trial volunteers, and it is an ongoing discussion in the medical community, if they're healthy and taking a drug to help determine the side effects they deserve some sort of compensation for that effort.
Looking further for more recent information, it turns out that the man had an unknown history of heart disease:
According to the investigation, the patient had suffered several small infarctions over the past years. In addition, the autopsy revealed coronary arteriosclerosis and myocardial hypertrophy existing for years.
These findings clearly prove impairment of cardiac function in this patient that had developed for many years. From MediGene's point of view, this is backing the assessment that a causal correlation between the death of the patient, which MediGene deeply regrets, and the administration of the trial medication is unlikely.