ผู้ป่วยที่เสียชีวิตในหรือก่อนปี 2138 กี่รายที่ได้รับการวินิจฉัยว่าเป็นภาวะหัวใจล้มเหลวเฉียบพลันแบบเรื้อรัง ไม่จำเป็นต้องใช้ตารางทั้งหมด
what number of patients who died in or before the year 2138 were diagnosed with acute on chronic systolic heart failure?It is not neccessary to use all the tables.
 demographic:  subject_id [ text]  hadm_id [ text]  name [ text]  marital_status [ text]  age [ text]  dob [ text]  gender [ text]  language [ text]  religion [ text]  admission_type [ text]  days_stay [ text]  insurance [ text]  ethnicity [ text]  expire_flag [ text]  admission_location [ text]  discharge_location [ text]  diagnosis [ text]  dod [ text]  dob_year [ text]  dod_year [ text]  admittime [ text]  dischtime [ text]  admityear [ text] 
SELECT COUNT(DISTINCT demographic.subject_id) FROM demographic INNER JOIN diagnoses ON demographic.hadm_id = diagnoses.hadm_id WHERE demographic.dod_year <= "2138.0" AND diagnoses.long_title = "Acute on chronic systolic heart failure"