WPF ListView - detect when selected item is clicked

I'm using a WPF ListView control which displays a list of databound items.

<ListView ItemsSource={Binding MyItems}>
    <ListView.View>
        <GridView>
            <!-- declare a GridViewColumn for each property -->
        </GridView>
    </ListView.View>
</ListView>

I'm trying to obtain a behavior similar to the ListView.SelectionChanged event, only I want to also detect if the currently selected item is clicked. The SelectionChanged event does not fire if the same item is clicked again (obviously).

What would be the best (cleanest) way to approach this?