Code

public partial class Window1 : Window
{
	public Window1()
	{
		InitializeComponent();
		diagram1.DefaultControlType = typeof(ListView);
		diagram1.Behavior = Behavior.DrawControls;
	}

	private void diagram1_InitializeNode(object sender, NodeEventArgs e)
	{
		var patients = new[] { new Patient("Jhon", 28), new Patient("Roy", 40) };
		var listView = e.Node.UIElement as ListView;
		listView.ItemsSource = patients;
	}
}

public class Patient
{
	public Patient(string n, int a)
	{
		Name = n;
		Age = a;
	}

	public override string ToString()
	{
		return Name + " : " + Age;
	}

	public String Name { get; set; }
	public int Age { get; set; }
}