A rupture of the right ventricle was associated with isolated myocardial infarction of this ventricle. According to a review of the medical literature, this is a rare condition, most ruptures of the right ventricle either being traumatic in origin or following extensive infarction of the left ventricle or interventricular septum or both of the latter.
David B. Shires. Rupture of the Right Ventricle. JAMA. 1968;203(10):888–890. doi:10.1001/jama.1968.03140100070022