Nearly one in four respondents to a survey by market research institute GfK thought they had a 70 percent chance of surviving a heart attack, the newspaper reported.
In reality the chance of surviving a heart attack is about 50 percent, according to the Bild report.
Few of the 502 men and women GfK surveyed in Germany were able to identify symptoms of a heart attack correctly.
Just over 14 percent correctly identified nausea as a sign of a heart attack, while 12.2 percent were able to identify feeling dizzy as a heart attack symptom, and 3.1 percent knew stomach pain is a symptom of a heart attack.