Personally, I d take the violins every time. Not that there aren t plenty of heart films I love. The Heart is a Lonely Hunter is one that comes to mind. A beautiful drama from the Carson McCullers book, it features a mute performance from Alan Arkin and the wonderful debut of Sondra Locke. It is interesting to note that the heart is the king of movie organs.
Internal organs are a tough sell in Hollywood.
I have never heard of a title with intestine in it. Maybe someone will make the definitive Mario Lanza biopic one day and called it Lungs. It might be the last movie pitch you make. Try Stomach Ache as a title proposal and you ll likely get a kick in the ass. In the end, only judicious use of body parts succeeds.