There were conflicting reports Wednesday on Prime Minister Nikolai I. Ryzhkov's condition eight days after he suffered a heart attack.

A Health Ministry official was quoted by the Tass news agency as saying the condition of the 61-year-old prime minister had not worsened, after a spokesman for President Mikhail S. Gorbachev said Ryzhkov was in "very bad condition.""Everything is going well," the official news agency said, quoting Dmitri Shcherbatkin of the Health Ministry branch responsible for senior government and Communist Party officials.