diff --git a/src/pages/MapaInterativo.tsx b/src/pages/MapaInterativo.tsx
index 063c332..9f8cfc3 100644
--- a/src/pages/MapaInterativo.tsx
+++ b/src/pages/MapaInterativo.tsx
@@ -1,4 +1,4 @@
-import React, { useState, useEffect, useRef } from 'react';
+import React, { useState, useEffect, useRef, useMemo } from 'react';
 import { Button } from '@/components/ui/button';
 import { Badge } from '@/components/ui/badge';
 import { Input } from '@/components/ui/input';
@@ -36,19 +36,23 @@ export default function MapaInterativo() {
     { id: 'permissions', label: 'Meus Acessos', icon: Shield }
   ];
 
-  const filteredNodes = nodes.filter(node => {
-    switch (activeFilter) {
-      case 'main-flow': return node.isMainFlow;
-      case 'permissions': return node.hasAccess;
-      default: return true;
-    }
-  });
+  const filteredNodes = useMemo(() => {
+    return nodes.filter(node => {
+      switch (activeFilter) {
+        case 'main-flow': return node.isMainFlow;
+        case 'permissions': return node.hasAccess;
+        default: return true;
+      }
+    });
+  }, [nodes, activeFilter]);
 
-  const filteredConnections = connections.filter(conn => {
-    const sourceExists = filteredNodes.some(n => n.id === conn.from);
-    const targetExists = filteredNodes.some(n => n.id === conn.to);
-    return sourceExists && targetExists;
-  });
+  const filteredConnections = useMemo(() => {
+    return connections.filter(conn => {
+      const sourceExists = filteredNodes.some(n => n.id === conn.from);
+      const targetExists = filteredNodes.some(n => n.id === conn.to);
+      return sourceExists && targetExists;
+    });
+  }, [connections, filteredNodes]);
 
   const getMapDimensions = () => {
     if (filteredNodes.length === 0) return { width: 1200, height: 800 };
@@ -80,11 +84,17 @@ export default function MapaInterativo() {
     };
   };
 
-  const [mapDimensions, setMapDimensions] = useState(getMapDimensions());
+  const [mapDimensions, setMapDimensions] = useState({ width: 1200, height: 800 });
 
   useEffect(() => {
     const updateDimensions = () => {
-      setMapDimensions(getMapDimensions());
+      setMapDimensions(prev => {
+        const next = getMapDimensions();
+        if (prev.width === next.width && prev.height === next.height) {
+          return prev;
+        }
+        return next;
+      });
     };
     
     updateDimensions();