has since 07/16/2102 been the heart rate of patient 27836 been normal?
select count(*)>0 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 = 27836 ) ) 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 between heart_rate_lower and heart_rate_upper and strftime('%y-%m-%d',chartevents.charttime) >= '2102-07-16'