HELP In 12 months plus 3 heart attacks and damaged kidneys

Hi Christina,
The chances are that if you ask for a review you will be sent a form to fill out, and your husband may need to attend an assessment.
Before you ask for a review, make sure you have as much evidence as possible. Consultant or GP reports and physiotherapist reports can help immensely. If you don't have these, then maybe fix an appointment with the GP and explain you need a report for PIP. (The GP may want a fee.) Or simply ask for a copy of your notes if you think these will help.
Have a think about exactly how far your husband can walk without feeling significant pain, risk of falls, repeatedly and within a reasonable time.
Can your husband get up from the chair without help, and without safely risks, pain etc? If not then he may score 12 points on that basis. Otherwise to gain enhanced rate he will need to show he can't walk more than 20m.
Each distance requires the 4 criteria briefly listed above to be met.
Acceptable standard which includes significant pain, safety, reasonable time no more than twice that of non disabled person and repeatedly across the day as reasonably required. If you have severe discomfort, then any walking done will be discounted. This can be SD thst exists before walking, so then the distance will be 0m, or if say it starts after 14m then the distance is 14m. SD can be significant pain, breathlessness, fatigue, dizziness etc.
Your husband's actual total walking distance may be considerably more than what he can do for PIP purposes. (In normal life if you need to get eg to the bank or even to the car, you have no choice but to grind through the pain, or just risk the fall etc- the test for PIP does not need you to do this.)

If your husband is approaching state pension age, get the review in ASAP, as you can't either claim mobility or upgrade existing mobility after state pension age.
If he is already in receipt of stste pension then regrettably the rules don't permit a mobility component.
There is always a small risk to an existing award upon review. Make sure you therefore make clear the difficulties leading to daily living points as well as mobility.

I hope this helps.
Good luck.
LL26