diff --git a/zabbix/datasource.js b/zabbix/datasource.js
index af924a2..c97e901 100644
--- a/zabbix/datasource.js
+++ b/zabbix/datasource.js
@@ -247,7 +247,9 @@ function (angular, _, kbn) {
         output: ['name', 'host'],
         sortfield: 'name',
         // Return only hosts that have items with numeric type of information.
-        with_simple_graph_items: true
+        with_simple_graph_items: true,
+        // Return only monitored hosts.
+        monitored_hosts: true
       };
       // Return only hosts in given group
       if (groupids) {
@@ -285,6 +287,8 @@ function (angular, _, kbn) {
         filter: {
           value_type: [0,3]
         },
+        // Return only enabled items
+        monitored: true,
         searchByAny: true
       };
       if (hostids) {
diff --git a/zabbix/queryCtrl.js b/zabbix/queryCtrl.js
index 5c43b3b..3c3401b 100644
--- a/zabbix/queryCtrl.js
+++ b/zabbix/queryCtrl.js
@@ -222,14 +222,16 @@ function (angular, _) {
       var name = item.name;
       var key = item.key_;
 
-      // extract params from key:
-      // "system.cpu.util[,system,avg1]" --> ["", "system", "avg1"]
-      var key_params = key.substring(key.indexOf('[') + 1, key.lastIndexOf(']')).split(',');
+      if (key) {
+        // extract params from key:
+        // "system.cpu.util[,system,avg1]" --> ["", "system", "avg1"]
+        var key_params = key.substring(key.indexOf('[') + 1, key.lastIndexOf(']')).split(',');
 
-      // replace item parameters
-      for (var i = key_params.length; i >= 1; i--) {
-        name = name.replace('$' + i, key_params[i - 1]);
-      };
+        // replace item parameters
+        for (var i = key_params.length; i >= 1; i--) {
+          name = name.replace('$' + i, key_params[i - 1]);
+        };
+      }
       return name;
     };