[CoD4] Disable Health Regeneration

[DjTranceFire]

Hey there..
I'm trying to disable health regeneration in my mod.
I know there is a dvar like "scr_player_healthregeneration" but setting it to "0" doesnt work.
Because of that i tried to force the health:

_health()
{
	while(1)
	{
		health = self.health;
		self.maxhealth = health;
		self iprintln("Health:" + health);
		wait 1;
	}
}

Its working but its not the best way to do it.
If the player gets damage, he's breathing all the time and if he gets enough damage to get <1 its like a godmode.
Does someone knows a better way to disable health regeneration in cod4?