As he entered his sixties, years of drinking, smoking, taking pills and being overweight left Tracy in poor health. On July 21, 1963, he was hospitalized after a severe attack of breathlessness. Doctors found that he was suffering from pulmonary edema, where fluid accumulates in the lungs due to an inability of the heart to pump properly. They also declared his blood pressure as dangerously high. From this point on Tracy remained very weak, and Hepburn moved into his home to provide constant care. In January 1965, he was diagnosed with hypertensive heart disease, and began treatment for a previously ignored diagnosis of diabetes. Tracy almost died in September 1965: a stay in the hospital following a prostatectomy resulted in his kidneys failing, and he spent the night in a coma.