A protein in your blood called Angiotensin II causes blood vessels to constrict and fluid to be retained in your blood.
Angiotensin II is present in everyone's blood.....however...
The concentration of Angiotensin II in the blood has been found to be significantly higher in people with certain disease processes such as hypertension.
ACE's are drugs that have been developed to specifically interfere with the action of the Angiotensin converting enzyme in people who have certain diseases where the Angiotensin II protein concentration is usually abnormally high.
The Action of ACE's:
ACE's work by blocking the production of a particular enzyme that is involved in the process of converting Angiotensin I into Angiotensin II.
With the action of Angiotensin II curtailed, your blood vessels widen and blood volume is reduced. The load to the pumping chamber(S) of your heart is also reduced.
ACE Inhibitors are used to treat...
heart failure (CHF)
elevated blood pressure or hypertension
diabetic nerve disorders known as neuropathy
ACE's may also be used immediately following a heart attack as damage to the heart muscle could cause reduced left ventricular efficiency and encourage heart failure (CHF) to set in.
In people who have been diagnosed with heart failure (CHF)...including those outside of the acute heart attack setting...the use of ACE's has shown a strong statistical reduction in the likelihood of death due to that specific cause.
Possible side effects may include:
Low blood pressure
Irritating cough
potassium retention - this can increase the risk of cardiac arrest
Immune system dysfunction - in the form of granulocytopenia
Swelling of eyes, mouth and throat
Angiotensin II Receptor Antagonists or Blockers
Valsartan - brand name Diovan
Losartan - brand name Cozaar
Candesartan - brand name Atacand
These drugs are commonly known as ARB's (Angiotensin Receptor Blockers) and are very similar to ACE's...in fact they are often used as an alternative as some research suggests that they may produce fewer side effects.
As the name suggests, ARB's interfere with the action of Angiotensin II on their target cells. This produces a similar effect to that of ACE Inhibitors by relaxing blood vessels.