Does ACE-Inhibitors have role other than control BP

[nspower]

ACE-I was prescribed to me post MI. I was encouraged to increase the dose upto 12.5 mg per day (ramipril). Over last two years the dose was reduced to 5 mg per day cosidering my BP was managed below 105/70 with this dose. Below 105/70 I feel uncomfortable. Now I am finding even with this dose my BP remains around 100/70.  May need to reduce further.

Is ACE-I prescribed only to control BP or does it have any other role in heart treatment? If so, is reducing the ACE-I  OK, considering my low EF??

Thanks in advance.

[ed34]

No, it should only affect your blood pressure.

[nspower]

Thanks ed34. You are right there.  
Initially in 2007, after my MI, I was put on 2x18.75 mg betablocker (carvidilol) and 2x6.25 mg ACE-I (ramipril) which was very high dose for me (resulting in fatigue, tiredness) but insisted upon by my cardiologist. This resulted in one evening my BP falling very low, pulse racing and syncope. The vaso-vagal was wrongly diagnosed as VT and implantation of ICD in 2008.

I changed my cardiologis after that and was brought to lower dose of beta blocker 2x12.5 mg and ACE-I 1x5 mg daily. My BP has remained at 105-110/70 throughout, thereafter. This helped me a lot, my health improved, my stamina improved and even my heary function has now improved.

After two years I am finding that my BP is moving towards 95-100/70 (I don not know the reason because nothing has changed) and my cardiologist has suggested to slightly reduce ACE-I. That is the reason I wanted to find out if ACE-I has any other role, other than reducing BP? If it is only BP than its OK. But if ACE-I also treats other heart conditions, will I not adversely impact them by reducing the dose of ACE-I.

Sorry about long explanation.

Thanks again.

[ed34]

I would have thought a lower bp would be more beneficial for helping a low EF and also giving your heart a break from harder work. If you imagine trying to blow down a pipe with a finger gently held over the end , this is your heart working with high bp. Trying to force blood through constricted arteries. Now blow through the tube with your finger off the end. This is your heart pumping blood through more dilated vessels, finding it much easier in work load. I think you have to get the balance right because if your bp gets too low, your heart will start to pump faster/harder to try and get the right amount of oxygen around the body. 100/65 is the level for low-normal. 110/70 is normal. 120/80 is suggested optimal. 90/60 is right on the border of low-normal.
Are you on beta blockers as well as ace inhibitors? because the two will intefere with each other and need a good doctor to balance them.