The daughters of Mstislav Rostropovich said yesterday that their visas were renewed by the Soviet government hours after their parents' citizenship was revoked - but that they have no plans to return to Moscow in the near future.

Rostropovich, the conductor of the National Symphony Orchestra, and his wife, soprano Galina Vishnevskaya, were denounced as "idealogical degenerates" by the Russian government in March.

The daughters, Olga and Elena - who joined their parents at a press conference yesterday at the Watergate Hotel - said that their status was unaffected by the action. Both are students at the Julliard School of Music in New York.

Olga, the older daughter, said she and Elena would be wary about returning to Moscow after they finish their studies here. "If we were there," she said, "we would not be sure to see our parents again. Our parents are supposed to be traitors."

Rostropovich and his wife are presently traveling on Monegasque (Monaco) passports, which are good for six months. During that time they will decide where they wish to establish their new home. "We have not yet had time to think of that," Rostropovich said, "since we must discuss it with our daughters.

"Our apartment in Moscow, which we bought with our money - it is not a government apartment - is locked," Rostropovich said. "Our things are there - records, and so on. If our daughters went back to Moscow, since they are still Soviet citizens, the apartment would belong to them.

"However," he added, "the government says . . . that the things in the apartment have nothing to do with them."

Rostropovich said that he and Vishnevskaya have had no response to requests for an official hearing.

The cellist recalled meeting Soviet Ambassador Anatoly Dobrynin at a Washington reception last fall. "He said to me," Rostropovich said yesterday, "'We are good friends with you, why not come to dinner?' I remember immediately I said 'Yes.' I even remember a date was set, Nov. 17. But then the embassy called and said, 'Sorry, he doesn't have time.'"

Rostropovich is in town for a week of auditions for violinists, cellists, and horn players for the National Symphony. On May 10 and 11 he and his wife will be in Tel Aviv and Jerusalem for concerts commemorating the 30th anniversary of the establishment of Israel.

Tomorrow morning at 10 a.m. he will testify before the Commission on Security and Cooperation in Europe, called the Helsinki Commission. The hearing, to be held in Room 1318 of the Dirksen Senate Office Building, is open to the public.