instruction: when was the first time patient 17505 was measured heart rate less than 76.0 until 1426 days ago?
response: SELECT chartevents.charttime FROM chartevents WHERE chartevents.icustay_id IN (SELECT icustays.icustay_id FROM icustays WHERE icustays.hadm_id IN (SELECT admissions.hadm_id FROM admissions WHERE admissions.subject_id = 17505)) AND chartevents.itemid IN (SELECT d_items.itemid FROM d_items WHERE d_items.label = 'heart rate' AND d_items.linksto = 'chartevents') AND chartevents.valuenum < 76.0 AND DATETIME(chartevents.charttime) <= DATETIME(CURRENT_TIME(), '-1426 day') ORDER BY chartevents.charttime LIMIT 1