After an examination, the New York City Medical Examiner’s office deemed that it was not a human heart, and likely belonged to a pig, DNAinfo reported yesterday.
Why was a pig's heart in the trash? One theory, per DNA:
Pig hearts are sometimes used in cooking — they are featured in recipes that are part of the Paleo diet and are the staple ingredient of several international dishes, including Bopis in the Philippines and Sarapatel in Brazil.