title: Sudden collapses in the heat in patients on angiotensin type 2 receptor blockers.
abstract: BACKGROUND
  A clinical case report is presented of some patients taking angiotensin type 2 receptor blockers (AT2RB) who collapsed without warning whilst being active outdoors in the heat.
  
  
  OBJECTIVE
  It is not possible to recognise hypotension due to the heat by testing in a controlled environment such as a doctor's office. Many people taking AT2RBs may be thus misdiagnosed and inappropriately treated.
  
  
  CONCLUSIONS
  Sudden collapse in a patient on AT2RB who is active in the heat should alert the physician to the possible cause of extreme sensitivity to low-grade volume depletion.
authors.affiliation: Benalla Hospital, Benalla, Victoria, Australia. radfordpnj@gmail.com.
authors.forename: P J
authors.initials: PJ
authors.lastname: Radford
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D057912:Angiotensin II Type 2 Receptor Blockers / Q000009:adverse effects* / Q000627:therapeutic use; D000959:Antihypertensive Agents / Q000009:adverse effects* / Q000627:therapeutic use; D001794:Blood Pressure; D015444:Exercise; D005260:Female; D006358:Hot Temperature / Q000009:adverse effects*; D006801:Humans; D006973:Hypertension / Q000188:drug therapy*; D007022:Hypotension / Q000209:etiology*; D008297:Male; D008875:Middle Aged
chemical_list: D057912:Angiotensin II Type 2 Receptor Blockers; D000959:Antihypertensive Agents