MY MOTHER JUST PASSED AWAY DAYS AGO. SHE WAS 75. SHE HAD MITRIAL VALVE REGURGITATION. SHE ALSO HAD 4TH STAGE LYMPHOMA (DIAGNOSED IN JUNE 13). SHE COMPLETED 4 CHEMO SESSIONS ALREADY. HER ONCOLOGIST SAID SHE WAS MAKING EXCELLENT PROGRESS. LAST MONDAY, SHE INDICATED THAT SHE HAD TROUBLE BREATHING. HER FEET WAS SWOLLEN. SHE COULD BARELY STAND UP. WE TOOK HER TO THE HOSPITAL. WITHIN A DAY, HER BREATHING CONTINUED TO WORSEN, AND SHE WENT INTO CARDIAC ARREST AS A RESULT... AND DIED. DO YOU HAVE AN IDEA WHAT HAPPENED?
Hi, welcome to Chat Doctor forum.  Your mother aged 75 years, had mitral regurgitation, and lymphoma and died with the breathing problem, and edema feet.  Here the cause of death may be due to the heart failure, secondary to the worsening of the regurgitation probably due to age.  Lymphoma also may play a role by metastasis somewhere in vital organs.  I wish her to have peace in heaven. Thank you.