You must re-consider your decision in keeping a low-carb, hi-protein diet since study indicates that this type of diet may lead people to higher risk of vascular diseases.
The Atkins diet, i.e. the kind of diet that suggests people to eat more proteins and lessen the amount of carbohydrate intakes, was proven to cause an unfavourable effect to the lab mice.
Researchers found that mice with a low carb diet built plaques in their arteries despite the fact that the diet has made them losing some weight. If this building of plaques occur in humans, it may lead one to face the risk of heart attack. FYI, a heart attack happens when the flow of blood is blocked (either by plaques or other factors). And when the blood is blocked, a part of vascular muscle will be deprived of oxygen (since the blood carrying a lot of it) which may lead that part of muscle to be damaged and die.
The low amount of carbohydrate is also pointed as the cause of the body's failure in building new blood vessels that help recover someone after he's got the attack.
Even though the tendency of a low carb diet causing one to suffer from heart disease has been indicated, the study is still continued to find a clear linkage between diets and vascular problems in details.*