1.   He underwent a quintuple heart bypass operation in November, spent nearly two weeks in a clinic and was forced to cancel two international engagements.

2.   In that role, he ran the country while Yeltsin convalesced from quintuple heart bypass surgery.

3.   That followed a six-month absence from work because of a quintuple heart bypass operation.

4.   Yeltsin had quintuple heart bypass surgery in the autumn of last year and has been traveling frequently in the past two months, visiting Siberia, China and Sweden.

5.   Yeltsin underwent a quintuple heart bypass after his re-election.

6.   Yeltsin had quintuple heart bypass surgery three years ago, and has repeatedly been hospitalized for pneumonia and other illnesses.

7.   A day after his quintuple heart bypass, Boris Yeltsin reasserted his tenacious grip on power and demanded a report on what went on while he was unconscious.

8.   A week after quintuple heart bypass surgery, Yeltsin is steadily becoming more active, according to his doctors and staff.

9.   He underwent quintuple heart bypass surgery later that year.

10.   His doctors and the Kremlin say they expect him to recover within days, stressing that the pneumonia is unrelated to his quintuple heart bypass surgery in November.