Angiotensin I is an inactive peptide in the renin-angiotensin-aldosterone system (RAAS). Renin cleaves angiotensinogen into angiotensin I, which is then converted by ACE into the active angiotensin I…
Category: Hormones
Also known as: angiotensin i, angiotensin 1, ang i, ang-i, ang1
Reference range: 11–88 pg/mL (Source: ABIM)
Standard unit: pg/mL
High values may indicate
High angiotensin I levels typically reflect elevated renin activity, seen in renovascular hypertension, kidney disease, heart failure, dehydration, or use of diuretics and ACE inhibitors.
Low values may indicate
Low angiotensin I may indicate suppressed renin activity, primary aldosteronism (Conn's syndrome), or excess salt intake.