Dilated Cardiomyopathy: This diagnosis is most likely due to the reduced ejection fraction (45% of the left ventricle and 27% of the right ventricle), global hypokinesis, and mid-myocardial late gadolinium enhancement of the left lateral free wall and apex, all of which are characteristic findings of dilated cardiomyopathy.

Nonacute Myocarditis: The presence of mid-myocardial late gadolinium enhancement, particularly in the left lateral free wall and apex, can also be associated with nonacute myocarditis, making this a plausible alternative diagnosis.
Pulmonary Hypertension: Although not directly diagnosed, the mention of hinge point late gadolinium enhancement associated with right ventricular pressure overload suggests that pulmonary hypertension could be a contributing factor or a related condition.

Sarcoidosis: Despite being less likely, sarcoidosis is a critical diagnosis not to miss due to its potential for significant morbidity and mortality if left untreated. The patchy nature of the enhancement in certain areas of the left lateral free wall can be seen in sarcoidosis.
Hypertrophic Cardiomyopathy: Although considered unlikely given the ventricular myocardial measurements, hypertrophic cardiomyopathy is a condition that can lead to sudden cardiac death, making it essential to rule out thoroughly.

Anderson-Fabry Disease: This is a less common condition that can present with similar cardiac findings, including late gadolinium enhancement patterns. It's crucial to consider in the differential diagnosis, especially if other causes are ruled out.
Chagas Disease: Another rare condition that can affect the heart and present with similar imaging findings. It's more common in specific geographic regions and should be considered based on the patient's travel and exposure history.