ידיד שלי דובר אנגלית הוא רשם לי שאמא שלו חולה ושיש לה בעיות בלב

i'm sorry to hear that. i hope she'll feel better soon

i'm so sorry to hear what your mother is going through
i really hope that she'll get over her illness
i'll support you in any way i can
i hope that she'll regain some strength

wishing her a speedy recovery