Other rare differential diagnoses to consider in this case may be other causes for myocarditis or cardiomyopathies, familial syndromes such as
Lenegre disease, cardiac tumors given his history of rhabdomyosarcoma, or syndromes in the rheumatologic realm.
Porsalt, R.D., Martin, P.,
Lenegre. A., Fromage, S., Drieu, K., 1990.
(2,3) In addition, both the primary sclerodegenerative conduction system disease of
Lenegre (4) and the sclerosis of the left side of the cardiac skeleton described by Lev (5) may manifest as RBBB + LPFB.
The ECG can also identify athletes with WPW syndrome and ion channel diseases, such as
Lenegre conduction disease, long or short QT syndromes, and Brugada syndrome (Corrado et al 2007, Lawless and Best 2008).
Analgesic activity was evaluated using the method developed by
Lenegre et al.