diff --git a/addons/medical/XEH_preInit.sqf b/addons/medical/XEH_preInit.sqf
index 065086c9cb..b896ddfcda 100644
--- a/addons/medical/XEH_preInit.sqf
+++ b/addons/medical/XEH_preInit.sqf
@@ -12,5 +12,12 @@ PREP(handleFractures);
 PREP(handleInternalInjuries);
 PREP(init);
 PREP(selectionNameToNumber);
+PREP(handleDamage_wounds);
+PREP(handleUnitVitals);
+PREP(getBloodLoss);
+PREP(getBloodPressure);
+PREP(getBloodVolumeChange);
+PREP(getCardiacOutput);
+PREP(setCardiacArrest);
 
 ADDON = true;
diff --git a/addons/medical/functions/fnc_handleUnitVitals.sqf b/addons/medical/functions/fnc_handleUnitVitals.sqf
index 745d4bb28d..063dda629b 100644
--- a/addons/medical/functions/fnc_handleUnitVitals.sqf
+++ b/addons/medical/functions/fnc_handleUnitVitals.sqf
@@ -93,12 +93,12 @@ if ((missionNamespace getvariable[QGVAR(setting_AdvancedLevel), 0]) > 0) exitwit
     // Check vitals for medical status
     // TODO check for in revive state instead of variable
     // TODO Implement cardiac arrest.
-/*  _bloodPressureL = _bloodPressure select 0;
+  _bloodPressureL = _bloodPressure select 0;
     _bloodPressureH = _bloodPressure select 1;
 
     if (!(_unit getvariable [QGVAR(inCardiacArrest),false])) then {
         if (_heartRate < 10 || _bloodPressureH < 30 || _bloodVolume < 20) then {
-            [_unit] call FUNC(setUnconsciousState); // safety check to ensure unconsciousness for units if they are not dead already.
+            //[_unit] call FUNC(setUnconsciousState); // safety check to ensure unconsciousness for units if they are not dead already.
         };
 
         if (_bloodPressureH > 260) then {
@@ -123,5 +123,5 @@ if ((missionNamespace getvariable[QGVAR(setting_AdvancedLevel), 0]) > 0) exitwit
         if (_heartRate < 20) then {
             [_unit] call FUNC(setCardiacArrest);
         };
-    };*/
+    };
 };
diff --git a/addons/medical/functions/fnc_setCardiacArrest.sqf b/addons/medical/functions/fnc_setCardiacArrest.sqf
new file mode 100644
index 0000000000..f23d269d8f
--- /dev/null
+++ b/addons/medical/functions/fnc_setCardiacArrest.sqf
@@ -0,0 +1,46 @@
+/**
+ * fn_setCardiacArrest.sqf
+ * @Descr: Triggers a unit into the Cardiac Arrest state from CMS. Will put the unit in an unconscious state and run a countdown timer until unit dies. <br />Timer is a random value between 120 and 720 seconds.
+ * @Author: Glowbal
+ *
+ * @Arguments: [unit OBJECT (The unit that will be put in cardiac arrest state)]
+ * @Return: void
+ * @PublicAPI: true
+ */
+
+#include "script_component.hpp"
+
+private ["_unit", "_modifier","_timer","_counter", "_heartRate"];
+_unit = _this select 0;
+
+if (_unit getvariable [QGVAR(inCardiacArrest),false]) exitwith {};
+_unit setvariable [QGVAR(inCardiacArrest), true,true];
+_unit setvariable [QGVAR(heartRate), 0];
+
+["Medical_onEnteredCardiacArrest", [_unit]] call ace_common_fnc_localEvent;
+
+//[_unit] call FUNC(setUnconsciousState);
+_counter = 120 + round(random(600));
+_timer = 0;
+
+[{
+    private ["_args","_unit","_timer","_counter","_heartRate"];
+    _args = _this select 0;
+    _unit = _args select 0;
+    _timer = _args select 1;
+    _counter = _args select 2;
+
+    _heartRate = _unit getvariable [QGVAR(heartRate), 0];
+    if (_heartRate > 0 || !alive _unit) exitwith {
+        _unit setvariable [QGVAR(inCardiacArrest), nil,true];
+        [(_this select 1)] call cba_fnc_removePerFrameHandler;
+    };
+    if (_counter - _timer < 1) exitwith {
+
+        //[_unit] call FUNC(setDead);
+        [(_this select 1)] call cba_fnc_removePerFrameHandler;
+        _unit setvariable [QGVAR(inCardiacArrest), nil,true];
+    };
+    _args set[1, _timer + 1];
+}, 1, [_unit, _timer, _counter] ] call CBA_fnc_addPerFrameHandler;
+